The Fundamental Facts You Must Know About Penis Extenders

Penis extenders (such as SizeGenetics and ProExtender) have over the last couple of years pretty much dominated the male enhancement market. So what’s the reason for their popularity? Well, it’s simple…no matter how sceptical you might be about natural enlargement methods, it’s absolutely impossible to ignore the overwhelming clinical evidence supporting both their safety and effectiveness.

What’s more, this isn’t skewed evidence presented by the manufacturers themselves in an attempt to legitimize their products, these are independently performed medical studies published in leading peer-reviewed medical journals including the British Journal of Urology and the Journal of Sexual Medicine (you’ll find more on this medical research below).

Basic Principles

Extenders simply apply relatively low levels of consistent and sustained tension (also known as traction) to the penile shaft.

This promotes gains in penis length through two independent physiological processes.

Stretching the Ligaments

Firstly, they gradually lengthen the ligaments (called the suspensory and fundiform ligaments) at the bottom of the penile shaft.

This is important because these ligaments hold a significant part of the penile shaft (4 – 6 inches worth) under lock and key behind the pubic bone. The next time you get an erection, have a poke behind your scrotum – you can easily feel how much of the penile shaft is hidden away there.

You may already know that penile lengthening surgery involves cutting these ligaments – a procedure that works better in theory than in practice. One of the many problems faced by men who opt for surgery is that during the healing process scar tissue formation tends to creates a ‘false ligament’ which pulls the penis back inside the body.

Because ligaments are naturally quite ‘elastic’ they possess the capacity to stretch whilst maintaining full functionality. As a result, penis traction seems to produce in practice what surgery only achieves in theory – a gradual exposure of the hidden penis and a resultant increase in visible penis length.

Cell Multiplication (Hyperplasia)

Traction also encourages a physiological process known as Hyperplasia - a process whereby cells multiply in response to physical stress. This multiplication of cells in turn leads to a gradual increase of tissue mass.

Hyperplasia occurs as the body attempts to adapt in order to better cope with the additional stress it’s placed under.

This physiological response is often exploited by orthopaedic medicine – where surgeons use traction to gradually straighten or lengthen the limbs of patients suffering from growth deficiencies or abnormalities.

Fortunately, the penis doesn’t contain bone, which obviously makes it more susceptible to positive growth through Hyperplasia.

Clinical Studies Supporting the Effectiveness of Penile Traction

As I mentions above, penis traction has been the subject of a great deal of research – so below I’ve outlined the results of two well known, peer reviewed medical trials. Because these studies were ‘peer reviewed’ i.e. they were scrutinised by third-party doctors, we can be pretty confident that the results are both unbiased and accurate.

Medical Study #1

One of the most detailed studies was conducted by a Danish plastic surgeon and urologist Dr. Jørn Ege Siana in 1998; and was presented at the International Interdisciplinary Symposium on Genitourinary Reconstructive Surgery (a highly respected gathering of urologists). Subsequently the study was published in the Journal of Sexual Medicine.

This 24 week trial involved 18 men, ranging in age from their early twenties to their late forties. Traction was used daily throughout the 24 week period and penile measurements were recorded by the research team every two weeks. The trial recorded some impressive results:

After 8 weeks, the 18 participants gained an average of 17 percent in erect length.
After 16 weeks (1100 hrs usage) participants achieved an average increase of 2.8 cm (1.1 inches) in erect length.
At the end of the 24 week trial, the average gain in erect length had shot up to 29 percent.
The biggest erect length reported in the trial came in at a monumental 40 percent.
Participants gained on average 1.9mm per week – equating to 4.56 cm (1.8 inches) in erect length over the entire 24 weeks of treatment.
Average gains in erect penis girth were more modest, but still significant, at 0.75 inches.

Going by these results, a man with a typical 6.4 inch penis could expect to achieve on average (by applying the 29 percent increase figure) a new erect length of 8.26 inches…which would mean having a penis bigger than 90 percent of the male population.

The only downside to the trial was that in order to achieve these impressive results, the patients used the traction device for 12 hours a day. Although medical grade extenders are designed to be worn comfortably for extended periods of time each day, it’s understandable if you’d prefer not to spend quite so much time each day with the device on.

Medical Study #2

Fortunately, another study conducted by urologists at San Giovanni Battista Hospital, Italy and published in the British Journal of Urology in 2008 gives us a good idea of the sort of results can be achieved with more moderate daily usage.

In this study 15 men employed the use of a medical grade traction device for just 4 hours a day over six months (just a third of the time in comparison to the previous study).

Six months later the study's 15 participants had achieved:

An average flaccid length increase of 0.9 inches
An average erect length increase of 0.65 inches.

The authors of the study concluded that these results showed that the use of penile traction was a ‘minimally invasive and effective treatment option’ for those looking for a natural alternative to lengthening surgery.

What you’ll probably have noticed from this later study is that the participants achieved on average about a third of the length gains that were reported in the first study.

Why? Because they wore the device for a third of the total time.

This is a finding that’s been corroborated in numerous clinical trials: Results achieved through traction tend to be directly proportional to the length of time the device is worn per day. In other words, the more you wear it each day, the quicker you see results.

The amount of time you spend wearing the device each day doesn’t affect overall results – you will still achieve the same overall length increases given time. But if you want to make gains as quickly as possible, you need to spend more time per day devoted to wearing the device.

The other point both these studies undoubtedly confirm of course, is that penile traction is extremely effective.

Better than surgery?

So how does using a penis traction device compare to undergoing penis lengthening surgery?

In 2006 a study published in the European Urology journal reported that the average gain in erect length of 42 patients who’d undergone lengthening surgery was just 0.5 inches. Furthermore, the study noted that approximately 5 percent of the men ultimately ended up around half an inch shorter than they were before surgery. As I mentioned at the beginning of this article, penile shortening can be a negative consequence of this procedure because during the healing process the formation of very inelastic scar tissue starts to pull the penis back inside the body.

One of the most interesting observations made by the researchers was that the best results were achieved by ‘some motivated patients’ who’d used a penile traction device during the healing phase – which produced gains of up to 3 cm (1.18 inches).

So the real question is, were those results produced by traction or the surgery? My guess is that it was probably the traction.

Safety Issues

Independent medical studies into penile traction have reported no adverse complications or injuries.

It’s important to remember however, that these studies all used medically developed devices - developed to provide exactly the right amounts of stretching force to produce optimum gains, whilst maintaining safety. Their anatomically correct designs also ensure that they can be worn comfortably for extended periods of time without causing problems.

At present only two medically certified devices are available – the Jes-Extender by DanaMedic and the AndroPenis by AndroMedical – you can read more about these devices below.

Both these devices are designed with safety, comfort and durability in mind – features that will ultimately provide you with significantly better results.

Which Device Should You Choose?

This is something I bet you don't know …

Ok…here’s where it gets confusing. You’ve probably seen a zillion penis extenders for sale all with different names – Jes-Extender, AndroPenis, Pro Extender, SizeGenetics, Vimax Extender, Euro Extender, X4 Labs, Pro Sizer, Ultimate Stretcher etc. etc. to name but a few.

What you probably don’t know is that most of these websites are resellers of just two products:

DanaMedic’s Jes Extender (SizeGenetics and ProExtender are the most well known resellers of this device)
AndroMedical’s AndroPenis (Vimax, Euro Extender etc).

Why do they all resell the same two devices? Basically, because the Jes Extender and AndroPenis are the only two medically certified devices available to resellers – they’re the ones that have been used with success in all the medical trials.

So when you see the phrase ‘type 1 medical device’ on a website you know you’re buying one or the other of these two devices. If the website doesn’t mention this, then in all likelihood you’re buying an imitation – which you don’t want to do for obvious reasons – lack of known safety, durability and effectiveness.

Now the problem is, a lot of the reseller websites will ship out whatever they have in stock – be it the Jes Extender or AndroPenis – so in reality you can’t tell with any certainty what device you’re buying. Neither will you know if it’s the latest specification device or one which they had lying around since 2007.

Not a particularly good prospect is it? When you invest a load of time researching each brand of extender and then spend $300 – 500 just to end up with something you didn’t expect.

Which is the Best - AndroPenis or Jes Extender?

I’ve bought both, and as far as I’m concerned it’s the Jes Extender.

The first thing that has to be said is that both devices are extremely well built, both have done equally well in clinical trials and both are certified as medical equipment. They even work in mechanically the same way.

But there are a couple of reasons I’m NOT keen on the AndroPenis:

I’m a big believer in KIS ‘Keep it Simple’ – with the AndroPenis there are A LOT of fiddly small parts. If you want to spend the best part of a day learning how to stick the thing together that’s fine – but it’s not for me.
The extension rods, which run down each side of the penis, have a habit of unscrewing themselves during use – because of this a lot of AndroPenis users end up having to secure the rods with tape.
The AndroPenis still uses on some models the old style silicone noose method of attachment. The problem a lot of men find with these (and I found myself) is twofold: 1). they can dig in just behind the head of your penis – cutting off circulation – leading to a very cold/numb penile head and 2). The end of your penis has a habit of slipping out of the noose every few minutes – which is just annoying.
If you buy through one of the many AndroPenis resellers you really won’t know whether you’ll end up with the noose or new comfort version. My guess is for the foreseeable future it will be the noose version because it’s cheaper.

So in my opinion that just leaves the Jes Extender.

The Jes Extender

The Jes Extender is the device the two big players in the market (SizeGenetics and Pro Extender) sell – and of course, it’s also available from the manufacturer DanaMedic.

This was the first medically developed penis extender to be made directly available to the public – way back in 1997. To date, DanaMedic reports that they’ve sold over 250,000 Jes-Extenders – making it by far the most popular device on the market.

Of course, as you’d expect from a medically certified device, it’s extremely well built, provides very accurate and safe levels of traction; and it has been clinically shown to work.

The 1998 study mentioned above recorded an average increase of 29 percent in erect length over the course of 6 months using the Jes Extender – achieved at an average of 1.9mm per week.
Another Jes Extender based study conducted in 2001 and presented at The International Congress of Urologists recorded an average net increase of 3.03 cm (1.19 inches) over just a 17 week period of use.

These studies however, were all conducted before the introduction of DanaMedic’s new innovative ‘comfort strap’ – a development that makes the Jes Extender even more reliable and easier to use than before.

New comfort strap compared to silicone noose

What's so Different about the Comfort Strap?

The comfort strap fitted to all new Jes Extenders replaces the traditional ‘silicone noose’ that most extenders still use to attach the head of the penis to the device. It’s a very simple idea, but it’s extremely effective for a few reasons:

It’s a one-piece design – very simple to put on and take off. Feeding the penile head through the alternative silicone noose is a fiddly and sometimes painful process because the penile skin has a habit of getting pinched as you tighten the noose.
The comfort strap also keeps the head of your penis attached very securely. Because of this you can really crank up the tension to maximum without worrying about the device slipping off.
You feel a much better stretch all the way along the length of the penile shaft. With the noose versions, you tend to feel most of the resistance just behind the head of your penis.
As the name suggests the ‘comfort strap’ feels a great deal more comfortable – you don’t have a thin bit of silicone digging into your penis.
The new comfort strap design doesn’t restrict circulation to the tip of your penis like the traditional silicone noose does. Because of that you can leave it on for extended periods of time without the end of your penis going cold and numb.

I’ve tried both silicone noose and the new comfort strap methods of attachment and because of the above points, it makes a BIG different.

Remember: the more you wear the device each day and the greater the level of traction you use, the quicker you’ll see substantial gains in length. So ultimately all these benefits of the new comfort strap design will equate to better gains in less time.

So the key points of the Jes-Extender in my opinion are:

It stays in place
It’s comfortable to wear
It provides very consistent levels of traction
It’s not as fiddly as the AndroPenis
Its medical grade materials are very durable
It’s medically designed, tested and certified.

The best places to buy the Jes Extender

The Jes Extender can be purchased directly through the manufacturer DanaMedic, or through a reseller. The most popular and reputable of which are SizeGenetics and ProExtender.

If you go to DanaMedic, you’ll notice that they offer several different versions of the Jes Extender – light, original, silver and gold. They are all the same device – just with varying amounts of accessories – in particular elongation bars.

A few important points:

DON’T buy the silver or gold plated versions – they’re just an expensive waste of money – the devices are no different.
DON’T buy the light version – it only extends to 6.7 inches - a complete waste of money if you’re looking to be more than just average.
The original version extends up to 9 inches, which should be ample. This is the one to go for – it costs 199 Euros (approximately $250)

Buying from SizeGenetics or Pro Extender

It’s really important to remember that if you buy from SizeGenetics or ProExtender, you are in fact getting a Jes-Extender – and it’s exactly the same Jes Extender you’d get from DanaMedic – the ‘Original’ version – which from DanaMedic directly costs 199 Euros (approximately $250)

The only difference is that both these resellers include an additional set of 0.5 inch elongation bars – so the device will extend to 9.5 inches instead of just 9. But these can be purchased directly from DanaMedic for 12 euros ($15 approx).

So is it really worth paying the extra $100 – 150 surcharge from buying through these companies?

Well...it can be worth buying from SizeGenetics for the following reasons:

They throw in a DVD of the Penis Health exercise guide (retails for $69.95) – which as you’ve probably gathered from this site is an extremely good, well researched and effective program (you can read my review of Penis Health here). One of the benefits of combining exercise with traction is that each method produces results through different physiological mechanisms: Traction through stretching, exercise primarily by increasing penile blood volume. By combining both you target the penis from every conceivable angle – which obviously promotes faster gains.
SizeGenetics also provide a very good ‘results’ guarantee – in fact, the best of them all. To quality, you just need to use the device for 120 days – and if you’re not happy with the results, they’ll give you your money back. (See the SizeGenetics official guarantee). The other companies require you to use the device for substantially longer before they’ll offer you a refund.
SizeGenetics will refund the cost of the device if you provide a genuine testimonial regarding the device’s effectiveness, together with ‘before and after’ photos – a pretty good incentive in itself to use the device once you’ve bought it. Full details of the free device offer can be found on this page of the official SizeGenetics website.
The company is currently also offering a $50 discount on their complete system – which brings the price down to $339.85. To quality, you just need to use the code ECON8 at checkout.
All SizeGenetics Jes-Extenders are provided with the new ‘comfort strap’ attachment system.

Jes Extender Bought From SizeGenetics ...

To find out more about the SizeGenetic package visit the company's official website.

What about buying from Pro Extender?

Pro Extender is another reputable reseller of the Jes-Extender Device. However, there are a couple of reasons I’m not keen on the Pro Extender deal:

They’re expensive – the ‘Original’ Jes-Extender bought through Pro Extender (they call it the Deluxe) without any extras costs $399 (from DanaMedic it costs approximately $250)
They also offer the ‘light’ version in a cardboard box – again at an inflated price - $299 from Pro Extender, 179 Euros (approx $225) directly from DanaMedic. However, you do NOT want to buy the light version from either source – as previously mentioned it only extends up to 6.7 inches – making it useless for serious use.
Pro Extender still markets their Jes-Extender as having the silicone noose attachment. This may just be sloppy advertising, but there are certainly no guarantees that you’ll get the better ‘comfort strap’ system. My guess is that they’ve probably got quite a lot of stock of the old noose style devices. Until they advertise that all devices are provided with the new comfort strap I’d stay clear.
Even their complete system, which includes an exercise DVD and month’s supply of VigRX doesn’t warrant the additional $150 outlay.

So in my opinion it’s a throw up between buying the Jes Extender directly from DanaMedic for $250; or if you want a better ‘money back guarantee’ together with a really good exercise manual to help to quicken your gains, buying from SizeGenetics (which will cost you $339.85 using the $50 discount code ECON8 at checkout).

UPDATE:

New Male Edge Extender Device

DanaMedic, the company behind the world famous Jes Extender (sold by SizeGenetics and Pro Extender) has just released a brand new, highly innovative penile traction device called Male Edge. The new device promises to take all the best bits of the Jes Extender, and then improve on it by making it even easier to use, more effective and better value.

I’ve had the opportunity to take the new Male Edge Pro for a test drive - the top of the range device. With a 169 Euro price tag (approximately $210), it’s a great deal cheaper than the Jes…but the question is, is it as good as the original?

My first impressions were that it looked a little ‘plasticy’ – as you can probably see from the pictures of my device below. But having used the Male Edge, I can tell you that this initial impression was totally unfounded...it certainly doesn’t affect the devices performance; and given the fact that DanaMedic provide a 2 year warranty on all parts, they’re going to have invested a great deal of time and money ensuring that it's extremely durable too.

In fact, the plastic design hasn’t been designed to cut corners but to improve on functionality.

The plastic, which is clearly some sort of high density polymer, makes the device extremely light – in fact, at 68 grams it’s the lightest traction device available.

So what? You’re probably thinking. Well…having worn it for a couple of days now, the main difference is that you don’t feel like your lugging a lump of metal around in your pants – it just feels a lot less obtrusive.

Another fundamental change is the Male Edge’s ‘all in one design’ – which makes it the definition of simplicity to use. The device comes pre-assembled with no elongation bars to fix or adjust and has a very smart ‘mount, click and wear’ design. No fiddling around, the device really does work straight out of the box and provides an extremely simple way to adjust traction levels too.

The original Jes-Extender (as do all other traction devices) use tension adjustment nuts that you have to manually turn to increase/reduce traction. The Male Edge on the other hand, comes with a brand new click system – you simply pull down on the elongation bars – when they click the tension is incrementally adjusted.

The ease of use of the new Male Edge is simply unequalled.

The new device comes with DanaMedic’s new ‘comfort strap’ design as well – so there are no problems with the device either slipping off or restricting blood circulation to the penile head.

It’s a good job too…because the Male Edge also provides almost twice the traction levels of any other device currently available.

The Jes Extender and similar devices offer adjustable traction ranges of between 900 – 1500 grams of traction. The Male Edge extender in comparison offers significantly increased ranges from 1.2kg – 2.8kg – making it the most powerful penile traction device available.

And you really do notice the difference – it provides an amazingly powerful stretch all the way along the penile shaft. What’s more, thanks to the ‘comfort strap’, the device still doesn’t slip off or feel uncomfortable even when set at max tension.

Fourteen years after DanaMedic launched the first medical penis traction device, it looks like they’re going to revolutionise the market again with the new Male Edge. Not only have they developed a product with maximum usability in mind (not to mention the most powerful device available) but they’ve also done so at a price that undercuts the rest of the market.

Male Edge Pro Pictures...

Key Points about Male Edge:

All in one design and precise click tension adjustment make it extremely easy to use.
Light weight design makes it very comfortable to wear.
24 month warranty covering construction and parts.
The most powerful traction device available – easily adjustable tension ranges from 1.2kg to 2.8kg
Double money back guarantee if permanent enlargement isn’t achieved after 1000 hours of use.
Comes with DanaMedic’s new ‘comfort strap’ system – ensuring the device won’t slip off or restrict blood flow even at maximum tension.
Adjustable to fit penis sizes from 1.6 inches to 9.5 inches.
Extremely cost effective – top end pro version (black device in red box) comes with 4 comfort straps for just 169 Euros (approximately $210)
Developed by the same company that pioneered the Jes Extender - the most successful penis traction device to date.

I’m not one for usually saying things like ‘this is the best product I’ve ever tried’ – but as far as penis extenders go, I have to say it is. Simple to use, easily adjustable, massive traction ranges, very comfortable and cheap - this is the device the penis enlargement market has been waiting for - a cutting edge piece of technology that doesn’t cost the earth.

Check it out at the official Male Edge website.

Below I've also set out the main differences of the packages mentioned on this page …so if you’re at all unsure, just refer to the table below.

Please remember: Danamedic, SizeGenetics and ProExtender all sell the same device - the Jes Extender. With the exception of the truly unique Male Edge device, the table below therefore provides a comparison purely on value, guarantees and extras offered by each company.

Traction Device	Jes Extender Original	SizeGenetics Device Only	SizeGenetics System	Pro Extender Device Only	Pro Extender System	Male Edge Basic	Male Edge Pro
Price:	$250	$350	$389.85 ($339.85 with discount code ECON8)	$399	$429.95	$160	$210
Warranty on parts & construction	2 Years	6 Months	6 Months	6 Months	6 Months	2 Years	2 Years
Comfort Strap / Silcone Noose	Comfort Strap	Comfort Strap	Comfort Strap	Not Specified	Not Specified	Comfort Strap	Comfort Strap
Number of Comfort Straps	1	1	1	N/A	N/A	1	4
Traction Levels	900 - 1500 grams	900 - 1500 grams	900 - 1500 grams	900 - 1500 grams	900 - 1500 grams	1.2 - 2.8 kg	1.2 - 2.8 kg
Penis Size Range	1.6 - 9 inches	1.6 - 9.5 inches	1.6 - 9.5 inches	1.6 - 9.5 inches	1.6 - 9.5 inches	1.6 - 9.5 inches	1.6 - 9.5 inches
Exercise Manual	No	No	Penis Health DVD	No	For Men Only DVD	No	No
Guaranteed Results	Double Money Back	Money Back	Money Back	Money Back	Money Back	Double Money Back	Double Money Back
Terms of Guaranteed Results	Use product for 1000 hours	Use product minimum 120 days. Return product within 180 days.	Use product minimum 120 days. Return product within 180 days.	Use Product for 180 days then MUST be returned within 187 days.	Use Product for 180 days then MUST be returned within 187 days.	Use product for 1000 hours	Use product for 1000 hours
Verdict:	Competitive Price / Good Warranty.	Good Guaranteed Results Policy but over priced.	Good Guaranteed Results Policy / Includes Penis Health DVD / $50 Discount Code ECON8 makes it worth considering.	Over priced / Question mark as to whether device is provided with comfort strap or noose.	Noose / comfort strap issue again.	Best Device but Pro Version offers better value.	Best Device & Package / Exceptional Value
Score out of 10:	8/10	7/10	8/10	5/10	6/10	9/10	10/10
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