A layering system is only as good as the base. This great quality and high performance baselayer from Under Armour is constructed from dual layer fabric with an ultra warm, brushed interior & a smooth, fast drying exterior. Stretch mesh back & underarm panels provide strategic ventilation and 4 way stretch construction moves better in every direction allowing you the flexibility you need. The fabric wicks moisture and dries really quickly with anti-odour technology ensuring you stay fresher for longer.