This Base Layer Top is designed to not only keep you warm, but remain comfortable during high-activity. There's a little spandex in there to give it some stretch, and raglan sleeves for full range of motion. That way the top stays put while climbing up the ladder stand or shoveling the lot. They quickly wick away sweat and dry fast, which helps regulate your body temperature. Even the thumbholes are a "little thing" that can make such a comfortable difference. Comfortable, warma |when the temps drop, wear this Base Layer Top. Stretch fabric with raglan sleeves moves when you do Moisture-wicking, fast-drying material helps regulate body temperature Thumbholes prevent sleeves from riding up when layering, during arm motions Extended back hem for added coverage Tagless label for itch-free comfort Double-needle topstitching for added durability Imported Call it "worry-free warmth". So get your Guide GearA(R) Base Layer Top today!