40Alpaca/40PimaCotton/18Nylon/2Lycra (C) A lightweight sock perfect for all activities including everyday wear. The alpaca fiber glides softly over feet reducing the chance of blisters forming and callus build up. Constructed of Alpaca and Pima Cotton, this blend allows for both comfort and breathability, better absorption, better drying and reducing odor. 100% Wool Free and Hypoallergenic. An All-Season sock, light enough for even the warmest day. Dye free, non irritating with flush seams and toe. Makes a wonderful no-show sock for wear with ankle boots providing more comfortable feet all day long. Machine washable in cold water and either air dry or tumble dry. Please refrain from using heat.