UA Storm technology on arms & shoulders repels water without sacrificing breathability. ColdGear® Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat. Dual-layer fabric with an ultra-warm, brushed interior & a smooth, fast-drying exterior. Mesh facemask & underarm panels deliver strategic ventilation. 4-way stretch construction moves better in every direction. Material wicks sweat & dries really fast. Anti-odor technology prevents the growth of odor-causing microbes. Smooth, chafe-free flatlock seam construction. Reflective forearm seams for greater low-light visibility. ARMOUR wordmark on back neck.