If youre looking for a super-warm compression baselayer for dynamic activity in cold weather conditions, then the sweat-wicking, Heavyweight II tight with thermal reflectors and 4-way comfort-stretch fabric is just what the winter recreationalist needs to stay warm, dry and ready to roll. CONSTRUCTION: Omni-Heat thermal reflective Omni-Wick Antimicrobial treatment protects this product from bacterial growth 4-way comfort stretch Ergonomic seaming Flatlocked construction Gusset detail Performance Fit