The Under Armour Men's Tactical ColdGear Infrared Base Leggings utilize ColdGear InfraredB. technology to hold in body heat without adding weight or bulk. This base layer features dual-layer fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior. The wide, encased elastic waistband sits at your hips for greater comfort. At the same time, the 4-way stretch construction allows for better mobility in every direction. With a thermo-conductive inner coating and sweat-wicking material, these Under Armour leggings will keep you warmer longer for workouts in the bitter cold.