Most Comfortable Mens Performance Underwear | Mens Pouch Underwear – BN3TH.ca, Radically Better Underwear | Increased Comfort = Increased Performance. At BN3TH, we create engineered apparel focusing on men's pouch underwear for all to feel confident in. We prioritize providing uncompromising support in the staple pieces that have a noticeable physical and mental impact on your everyday life.