As your body radiates energy, the mineral-filled substance absorbs it and reflects it back into tissues and muscles, thus improving endurance and strength.Durable, lightweight HeatGear® fabric with all the benefits of UA Compression.Mesh panels for strategic ventilation.Anti-odor technology prevents the growth of odor-causing microbes.Strategically glued seams eliminate irritation and abrasion.Contoured hem and modified front at the neck.Symmetrically placed graphics and small Under Armour logos, typical of UA RUSH.Material: Polyester.