Features of the Smartwool Women's Merino 150 Lace Baselayer Bottom Lightweight lace fabric combines the moisture management, temperature regulation, and odor resistance of merino with the durability of nylon Merino-lined, elastic waistband designed for maximum comfort; 100% Merino next to skin Merrow seam construction designed to minimize chafing Fabric Details 77% Merino Wool, 23% Nylon