The Fat Boy™

The All New Fat Boy Penis Sheaths

We are thrilled to introduce the new Fat Boy™ line of Penis Sheaths, which includes our classic Fat Boy™ Thin and the Fat Boy™ Ultra Fat–formerly known as our super popular Fat Boy Sport–plus two new textured models, the Fat Boy™ Checker Plate and Fat Boy™ Micro Rib. All are packaged in all new vertical storage packaging.

The All New Fat Boy

The two newest models, the Checker Plate and Micro Rib, are both designed and proven to give both partners pleasure. The Checker Plate texture is the most stimulating for the receiver, while the Micro Rib texture provides a more gentle stimulation. Both are available in three size options.

Note: We no longer refer to the Fat Boy™ products as penis "extenders," but instead use the term Penis or Cock "Sheaths." And, FYI: We invented this category of sex toys!

A Little Fat Boy™ History
The Fat Boy™ was the first soft stretchy cock sheaths ever conceived. It was born from the desire to have both partners reach orgasm while using an “Penis Extender or a Penis Sleeve”. This innovation started an penis "extender" revolution, and the industry has aptly called this new concept cock “Sheaths.”

To this day, 10 years after we first made the first Penis sheath, the Fat Boy line is a best seller and continues to be recognized as one of the best sex toys made. Men’s Health named it one of the best sex toys of 2017!

What made this possible, was the development of a remarkably soft, silky and stretchy material we call SilaSkin™. The first TPR/Silicone to ever be used in production, this unmatched and seriously sensuous material has become a building block for many other award-winning products by Perfect Fit. 

Our ultra-real feeling cock sheaths are designed to give both partners intense, eye-rolling pleasure. For the receiving partner, the Fat Boy™ adds girth, while for the wearer, with its interior nubs and ribs, it also acts as a stroker.

The Fat Boy™ penis sheath is extremely comfortable, surprisingly easy to get on and off and stays in place thanks to its closed tip and a thick loop that wraps around the base of the scrotum, which gives a pleasurable tug to a man’s balls during penetration or stroking.

The feedback from the tens of thousands of Fat Boy™ customers is consistent: Women are crazy for the orgasm-triggering stimulation from the added girth sleeve. Men dig the stroker action with or without a partner. Women also like it over the hand as a manual masturbator. And anal bottoms enjoy the thrill of taking a daringly massive, yet remarkably comfortable cock. But don’t take our word for it, scroll to read customer reviews.

CS-02C-N Fat Boy™ Ultra Fat Sheath 5.5” - Medium
CS-01C-N Fat Boy™ Ultra Fat Sheath 7” - Large
Both add 1" girth.

CS-05C-N Fat Boy Thin Sheath 5” - Medium
CS-03C-N Fat Boy Thin Sheath 6.5” - Large
Both add 0.5" girth.

CS-20C Fat Boy Checker Plate Sheath 5.5” - Medium
CS-21C Fat Boy Checker Plate 6.5” - Large
CS-22C Fat Boy Checker Plate Sheath 7.5” - Extra Large
All add 0.7" girth.

CS-25C Fat Boy Micro Rib Sheath 5.5” - Medium
CS-26C Fat Boy Micro Rib Sheath 6.5” - Large
CS-27C Fat Boy Micro Rib Sheath 7.5” - Extra Large
All add 0.7" girth.

We have a 100% satisfaction guarantee. If you are not happy with your sizing choice contact us for a free replacement. 

Available colors: Clear 

Clean up: Wash thoroughly with mild soap and water.

Safety: This Penis sleeve product is not a contraceptive or a substitute for a condom. Safe with water based lubes. This product is not compatible with latex products. Please store separately. 

Perfect Fit Brand Products are sold and intended for use strictly as adult novelty toys for entertainment. They are not intended for medical use and have not been clinically tested. No medical claims are warranted or implied by the use of these products. These products are Phthalate free, do not contain latex, and meet European EN71-3 toy safety standards.

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