Built tough to withstand the rigors of thru-hiking, the Darn Tough Men&';s Hiker Boot Midweight Hiking Sock is vetted by hikers who demand a durable and dependable companion on the trail. Made with full cushion from top to toe, and loaded with Merino wool to be cool in summer, and warm in winter. Features: Cushion: heavy - full cushion throughout the entire sock Weight: midweight Height: boot Performance fit for no slipping, bunching, or blisters Fine gauge knitting for durability Merino wool regulates temperature Fast action wicking pulls moisture away from the skin