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