There are mocks that claim to keep you warm&8212;and then theres the Womens 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 mocks 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&8212;its proof that all turtlenecks are not created equal. Features Smooth, soft fabric increases comfort & performance Soft brushback knit traps heat to better maintain your core temp Signature