Capilene® Thermal Weight is a step-up from the midweight Capilene with more insulation and great breathability. Soft, stretchy and smooth face Polartec® Power Grid™ fabric has up to 92% recycled content and is easy to layer. A brushed-fleece grid interior makes it a super warm base layer for the coldest days of the year that wicks moisture, dries quickly and feels smooth against your skin. HeiQ® Fresh durable odor control means longer wearing, yet still being welcome among friends.