Sitka CORE Merino 220 Bottom is a must have addition to any mid to late season hunting kit. Its Merino wool offers a high warmth-to-weight ratio for extra warmth without extra bulk. This design also helps regulate temperature so you won’t over heat, and features a natural resistance to body odor to help you remain undetected. Other features include Sitka’s ArmorSpun reinforced Merino wool fpr long lasting durability.