The Mountain Hardwear Men's Diamond Peak Thermal Tight is a toasty layer for adventuring through the cold backcountry. Icy weather doesn't have to be uncomfortable thanks to this Merino Wool layer that stretches, warms and even resists odors. The waffle texture is reminiscent of the classic long john, but the fabric Technology is all 2019. Warmth without the overheating or soaking sweat. Features of the Mountain Hardwear Men's Diamond Peak Thermal Tight Merino wool regulates body temperature and resists odor Full gusset construction for the ultimate freedom of movement Ergonomic seams Are chafefree Fabric Details Stretch thermal merino 200 97% Merino wool, 3% Elastane