Description of Keen Wildwood 3/4 Crew Lite Socks Get Outside to what inspires you. Features: Material: Natural Merino wool & nylon/lycra A multisport style that takes inspiration from our Newport sandal Anatomically designed to fit his right and left foot Cushioning across entire foot bottom for impact reduction and moisture management Ravel free double welt top to keep socks up Y heel pockets for better fit Anatomical Flex Fit system reduces bunching of material underneath feet Air panels to promote air circulation Lycra top to bottom for fit and comfort