tasc performance Boxer Brief underwear for Men features performance technology offers comfortable blend of bamboo and cotton to make this the most comfortable underwear you will ever wear. Moisture wicking transfers moisture away from your skin and dries quickly. Breathable fabric and ventilated panels keep you cool at peak performance. Bamboo fabric naturally repels bacteria and therefore repels odor. 4 way stretch engineered to move with you for non restrictive work outs. Light weight.