The Innerwear is a male-enhancement underwear and anti-turtling device. It lightly stretches your penis to grow inches while adding plenty of girth as well. When worn regularly, the device will actually train your penis to hang longer and reduce shrinkage.

Prevents Retraction

Wearing the Innerwear eliminates retraction that can lead to a negative effect on your confidence.

Extension Training

When worn daily, Stealth Innerwear continuously trains your anatomy to remain fully extended.

Bulge Enhancing

Our design lengthens the penis up to twice its normal flaccid size while adding plenty of extra girth too!


Does not interfere with daily activities such as urination.


Stealth always stays in place and doesn't slip off.


Can be put on and taken off quickly and easily.


Expands easily and comfortably to accommodate spontaneous erections

True Innerwear

Can be worn under anything - underwear, swimwear or on its own.

Healthy Functions

Infused with Negative Ions, FIR Therapy and Antibacterial properties.

What's included

With your purchase of the Innerwear, you will receive a free Jacket, Skin and Retainer Band. These extra components work together to give you a longer extension, fatter girth and better durability.


An integrated penis sheath and base band that comfortably supports the entire package.


A discreet spandex jacket that adds extra girth for a longer and thicker profile.


A nude coloured layer of thin spandex that helps lengthen the penis shaft.

Retainer Band

A silicone band that maintains engorgement and prevents slippage.

  • Honestly I've tried so many methods to enhance what I've got for nearly 10 years, finally found a product that's doing the business for me.
  • I just made my second purchase, I must say it is an ingenius design and concept. Now I have an underwear bulge I can be proud of!
  • Stealth feels awesome, I just adjusted my package and it feels heavy and thick!... cash your check, the Stealth is well worth the money!
  • What I like best is that you can wear it to achieve an enhanced but naturally looking bulge. A great product to increase girth, length and soft size.



Please follow the measuring instructions at the bottom of this page. Then enter your length and girth into the drop-down boxes below. Our calculator will automatically choose the most suitable size for you. If you select the “Buy Now, Measure Later” option, our sizing expert will send you an email to help you choose your size.

Our broad spectrum of 99 sizes helps ensure that every man gets his perfect fit. For optimum performance, Stealth must be sized accurately. Please follow the instructions below carefully.

Measuring Instructions


To measure length: In the flaccid (soft) condition, clamp your penis head using your thumb and finger. Fully extend your penis to a comfortable stretch. Lightly press the ruler slightly (1/2" only) into the fat pad towards the pubic bone. Measure along your shaft without including your penis head.


To measure girth: Once again, fully extend your penis to a comfortable stretch. Use a measuring tape to measure the circumference of your shaft right behind the penis head. If you do not have a measuring tape, wrap a strip of paper behind your penis head. Mark the strip of paper and then measure the distance on a ruler.


After you’ve measured yourself and double-checked for accuracy, enter your length and girth into the drop-down menus. Our calculator will automatically choose the most suitable size for you. The size code will be shown in the display box for your reference. You may manually adjust it, if needed.

How to Measure
How to Wear

Customer Reviews

Based on 128 reviews
Fits good!

The innerwear fits relatively good. It’s little bit tighter but it is my mistake by measurement. It is comfortable and looks really good. I don’t know it it works yet because I have it two days but I like the feeling that my penis is stretched.

Emmanuel Clayton
Great product

Works well. When ordering, be sure to confirm that you measure yourself according to the directions given.

OMG! My new addiction!

Received my innerwear last night wore it for a couple of hours, sizing was perfect but didn't have things positioned quite right put it back on before work this morning, bingo it felt better, went to work with it on and my coworkers must have thought I got a raise with the smile on my face! If they only knew! 12 hrs later and back home and have yet to adjust anything! I had to put one of my balls back in the strap once (I do some lifting and climbing) but was amazed at how they stayed in place! I don't want to take it off! Almost like having an erection all day, wow! Even logged in during the work day today and ordered some other items! I'm hooked!

Robert Rokovitz
Best invention ever

I’ve been a SFM customer for 6 years. I order extra innerwear with every order just in case there is a supply issue or they discontinue the product. I wish there was a way to recommend this to people. But it is such a private issue that is hard to promote without fear of judgement.

Chris Harlow
It may take time…

I bought the innerwear and corkscrew. Getting the Innerwear on took a few tricky attempts, but once it was on I managed to keep it on. It was uncomfortable to begin with and I kept going to the restroom to adjust myself.
After a few wears I sometimes forget it’s there.

The corkscrew feels REALLY heavy and I worry that it could do some damage, so I’ll wait a while before trying that again.

Overall, I love the feel. Will sometimes fasten the stud for a tighter fit if I’m not doing too many errands. I like the fuller feeling in my pants, although it sometimes seems like I have a permanent erection.