SmartWool Merino 150 Pattern Beanie Merino,Nylon,Wool Imported Flatlock seam construction designed to eliminate chafing Smartwool's lightest weight Merino jersey fabric uses a nylon core to increase durability while keeping Merino Wool next to skin Knit in Vietnam: 87% Merino Wool, 13% Nylon Core Style:SW018027 Machine Wash Warm, Gentle Cycle Wash With Similar Color Do Not Bleach Tumble Dry LOW Cool Iron When Needed Or Dry Clean - For best appearance, wash garment inside out and flat/line dry.