Dri Release Wool: Super soft, high wicking, anti-microbial. Nano Glide: In heel and toe, soft and friction free prevents blisters. Fibre Composition: 50% Polyester, 7% Wool, 26% Polyamide (Nylon), 15% Polyamide Nano Glide, 2% Elastane. Mid-level anatomical cushioning in key pressure zones for optimum comfort. Anti-Odour: Anti microbial & high wicking properties from Dri Release Wool. Flat under toe seam construction. Vented upper and arch grip.