The Ex Officio Give-N-Go Sport 2.0 6 Inch Boxer Briefs - 2 Pack 1241-3450 wicks moisture with improved breathability, allows for air circulation, and has anti-odor microbial properties, with a supportive contour pouch with fly opening. Ex Officio Give-N-Go Sport 2.0 6 Inch Boxer Briefs - 2 Pack is made of nylon/elastane.