The Underwear That Makes You Comfortable We used a smaller check print to fit better on the jock. An update on our Classic Backwoods. Bear Skn Jocks are the most comfortable underwear for big guys. Designed specifically for big bodies with our luxe and lightweight fabric. Brief front with an open back. 67% Rayon Made From Bamboo, 28% Cotton, 5% Elastane 2x softer than cotton alone Keeps you cooler and wicks moisture away from your body.