Stretch-mesh back and underarm panels for ventilation. 4-way stretch material for better movement. Wicks sweat and dries quickly. Ergonomic design to avoid high abrasion areas. Mock neck for added coverage and warmth. Dual-layer fabric with a warm, brushed interior and a fast-drying exterior. Dropped, shaped hem. Fabric - 87% polyester, 13% elastane. Fitted - streamlined fit. Care - machine washes cold with like colors, non-chlorine bleach when needed, tumble dry low, do not iron, do not use softeners, and do not dry clean.