Built from the lightest and toughest merino wool in the industry, the ULTRA Merino 120 LT line-up maximizes all the natural performance benefits of merino, like odor resistance, low-sheen concealment, UPF protection, thermoregulation, and an ultra-soft feel. Offered in a hoodie sun shirt, long and short sleeve crew tees, and a zip-off thermal bottom. These hunting shirts excel in the heat, or as a base layer in the cold.