evo.com | Smartwool Long Underwear Bottoms > A base layer that earns its keep on ski days, trail days, and everything in between. The Smartwool Kids' Classic Merino Blend Base Layer Bottoms combine 50% Merino wool with 50% COOLMAX recycled polyester, a naturally temperature regulating blend that wicks moisture for maximum next-to-skin comfort. Flatlock Seam Construction Designed to Eliminate Chafing Slim Fit Intended to follow the contours of the body. 50% Merino Wool / 50% COOLMAX(R) ECOMADE Recycled Polyester Merino-Lined Elastic Waistband Designed for maximum comfort, 100% merino next to skin. | Kid's SmartwoolClassic Blend Base Layer Bottoms 2027 - X-Small Gray | Wool/Polyester