Under Armour Men's Original Series Cupron Boxerjock 90% Polyester/10% Elastane Imported Cupron AntiFungal Pro Fibers kill 99.9% of the jock itch fungus (T. mentagrophtes) after 12 hours of contact with fibers Lightweight, smooth HeatGear fabric & articulated mesh fly panel 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast Performance waistband