Constructed with temperature-regulating merino wool, this sock is a perfect companion for trail and hiking adventures. Why you'll love it: This High-quality merino wool blend is designed to keep your feet comfortable in harsh elements as well as hot weather. Features: Suede upper Rear pull tab, Clear TPU heel counter, Clear TPU UGG(R) graphic strap 17mm UGGpure(TM) upcycled wool lining or 17mm UGGplush(TM) 80% upcycled wool, 20% lyocell lining Clear TPU outsole Textile binding made from 100% recycled polyester fibers 3.75" shaft height Woven label with UGG(R) logo on insole