Description of Keen Boulder Canyon Low Cut Ultralight Socks - Women's Low and 'lite' inside your shoes, just right for your days outside. Features: Material: Natural Merino wool & nylon/lycra An extremely lightweight multi-sport style anatomically designed to fit her right and left foot Cushioning in key areas - heel and toe 3 Air panels to promote air circulation Y heel pockets for better fit Anatomical Flex Fit system reduces bunching of material underneath feet Lycra top to bottom for fit and comfort Ravel free double welt top to keep socks up Reinforced toe and heel for extra durability