Smooth, soft fabric increases comfort & performance Soft brushback knit traps heat to better maintain your core temp Signature Moisture Transport System wicks sweat to keep you dry Anti-Odor technology prevents the growth of odor-causing microbes Grippy bottom hem prevents your mock from riding up Smooth, tonal flatlock stitching eliminates chafing Polyester/ Elastane There are mocks that claim to keep you warmand then there&0s the Women&0s UA Cold Gear Longsleeve Compression Mock. The comfy difference is in the dual-layer fabric. It traps heat & wicks sweat on the inside while protecting you from the cold on the outside. This mock&0s super-tight UA Compression fit gives you an extra boost of power right where you need. Finished with a grippy hem to keep it in place, extended body length for greater coverage, & Anti-Odor technology.