Balega's Blister Resist Crew socks are the perfect combination of nature and technology. Featuring both Drynamix, a moisture management fiber designed to keep feet dry and cool, and natural mohair fibers to keep feet cool during the summer, and warm during the winter, the Blister Resist is the perfect sock for year-round activity.Details:Provides extra protection and comfort with extended cushioned crew sock heel Keeps out grit and grime, adds additional security and comfort, prevents pressure marks, and aids free movement with enhanced elastic grip construction in crew sock rib top Eliminates the risk of sheer friction blisters Keeps feet cool and dry with ideal combination of mohair and our signature Drynamix moisture wicking fibers, plus specially constructed, reinforced microfiber mesh ventilation panels. Maximizes comfort with hand-linked seamless toe, enhanced and wide arch support band Provides additional no-slip security with enhanced elastic grip construction