Bn3th Men's Infinite XT2 Boxer Brief's Permanent XT2® Technology kills odor and won't wash out. Supportive MyPakage Pouch Technology™ keeps your boys comfortable. Feels like Sunday, grinds like Monday. Meet the best of the best: the revolutionary comfort and softness of Modal Classics and the moisture wicking properties of Polyester meet XT2® NO STINK Technology, a permanent silver anti-odor technology that kills stink before it starts by preventing the growth of odor-causing bacteria and won’t wash out.. The ultimate Boxer Brief.