(Patent Pending) ‎Our most popular and well-known design to date, the SHEATH 4.0 Boxer Brief is the pinnacle of function and style, now available with the added weight and softness of our Bamboo Fiber blend.‎‎Due to the precious materials involved in its creation, the SHEATH 4.0 Bamboo is only crafted in small batches. Be sure to get yours while supplies last. Functional Black Multi-pack Boxer Briefs, Functional Black Boxer Briefs With Built-in Shorts, Compressive Black Boxer Briefs Multi-pack, Compressive Breathable Black Boxer Briefs, Compressive Black Multi-pack Boxer Briefs, Compressive Black Boxer Briefs With Built-in Shorts, Functional Black Boxer Briefs For Sports, Compressive Multi-pack Black Boxer Briefs, Black Boxer Briefs For Sports