Description of Keen Bellingham Quarter Lite Socks Casual, cushioned, comfortable. Features: Material: Natural Merino wool & nylon/lycra A lightweight casual style anatomically designed to fit his right and left foot Cushioning across entire foot bottom for impact reduction and moisture management Y heel pockets for better fit Lycra top to bottom for fit and comfort Anatomical Flex Fit system reduces bunching of material underneath feet Ravel free double welt top to keep socks up Reinforced toe and heel for extra durability