Ultra Trail Run Socks A trail sock that pushes the limit of endurance and experience, Running an Ultra demands more from your running shoes and socks. Just like the iconic ULTRA GLIDE shoe, the ULTRA CREW is designed for clocking up the kilometers. The elasticated knit provides light compression and support, and always stays in place however far your passion takes you. 1. Long-distance comfort 2. Perfect Fit 3. Moisture management 42% Polyamide 28% Polypropylene 26% Wool 4% Elastane