Bridgedale Ultra Fit Ski Socks Fine-knit, close fit style suitable for custom fitted boots. Merino wool and Endurofil help with moisture absorption as well as keeping the cold out and the warmth in. Super thin toe seam Graduated tension over the calf for improved fit 38% Merino Wool, 38% Endurofil/polypropylene, 22% Nylon/polyamide, 2% Lycra/elastane