UA Youth Coldgear Armour Compression Mock Dual-layer fabric with an ultra-warm, brushed interior & a slick, fast-drying exterior. Stretch-mesh gusset & inseam panels provide strategic ventilation. 4-way stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat away from the body. Anti-odor technology. Flat lock seam construction. Ergonomic mock neck with ARMOUR wordmark on back. 87% Polyester, 13% Elastane.