As your body radiates energy, the mineral-filled substance absorbs it and reflects it back into your tissues and muscles, improving endurance and strength. The strategic placement of the seams is used to eliminate pressure points and abrasion. Secure zippered pockets for your hands and your small items. Double-layer cuffs on the sleeves with built-in thumb holes. Shaped hem for better back coverage. Products with Celliant have been designated by the FDA to increase local circulation, leading to faster recovery. Small Under Armour logos, typical of UA RUSH. Material: Polyester / Elastane.