These aren’t your grandpa's long underwear. The unique negative grid traps monster warmth without adding weight and it’s smooth on the outside to let you layer. Simply put, this is the baselayer you want on every cold weather mission.
WARNING! This product will melt when exposed to extreme heat or open flames, posing a risk of serious injury where melted product comes into contact with skin!
UA Base™ fabric is built to fight the bitter cold without weighing you down
Soft, brushed grid interior traps hot air, providing superior warmth
4-Way Stretch fabrication allows greater mobility and maintains shape