Premium Yak Wool Comfort Experience the extraordinary comfort of Tibetan yak wool-one of nature&';s most remarkable fibers. Our single-pack yak Ultimate Full Cushion Boot Socks feature full cushion comfort throughout the footbed, combining premium materials with thoughtful design for all-day wear. Premium Comfort: Full cushion footbed for superior support Wide ribbed cuff stays up without binding Why Yak Wool? Hypoallergenic and gentle on sensitive skin Naturally antimicrobial to fight odor Moisture-wicking keeps feet dry Insulates heat without overheating Extra soft hand feel Sizing: Small/Medium fits women&';s 6-9, men&';s 5-8 Medium/Large fits women&';s 10-12, men&';s 9-13 The United By Blue Difference: Every pair removes one pound of trash from oceans and waterways-so you can feel good while your feet feel great. Available in both subtle solids and classic striped patterns. Perfect for daily wear, outdoor adventures, or anyone who demands more from their socks.