The Bellingham Sock from Keen is made from temperature-regulating, breathable merino wool. Seamless toe in flex zone reduces bunching. Extra cushioning on the bottom absorbs impact. Reinforced toe and heel offer durability. Keen offers right and left-foot specific socks for the best possible fit. Low sock has a no-show, below the ankle fit. Ultralite-weight fabric. 60% merino wool, 35% nylon, 3% Lycra spandex, 2% polyester.