Under Armour Men's Ua Original Series 6'' Boxerjock&reg; Medium Polyester Size Medium, C0lor Neo Pulse Polyester/Elastane,HeatGear moisture transport ensures fast drying performance that keeps you cool and won't weight you down. Odour Control - Controls odour by preventing the growth of odour-causing microbes. Strategic Ventilation - Strategic venting built into garment at key points where body dumps heat. Keeps athlete cool in extreme heat. High Elastane Content - Provides excellent support with great stretch and recovery properties.