The Mossy Oak Base Layer Top was designed to keep you warm in a comfortable fit. As the mercury drops during hunting season, you'll need to keep adding layers underneath your camo to stay warm and keep hunting comfortably. It features moisture-wicking fabric so you won't get cold if you build up a sweat and thumbhole sleeves so you can easily slip over your outer clothing and make sure the sleeves don't ride up your arms. It's a great piece to keep in your closet during Fall & Winter.