You'll be heading to the mountains in the Smartwool(R) Women's Outdoor Advanced Light Micro Socks. Constructed from Merino wool these socks control moisture, regulate temperature and prevent odor so your feet stay cool, dry and comfortable. With reinforced heels, toes and soles for durability, you'll get as much use out of these socks as you do your boots. The Smartwool(R) fit system features an elasticized arch and ankle support so you won't have to stop and adjust your socks. Get the durability and performance you crave in the SmartWool(R) Women's Outdoor Advanced Light Micro Socks. FEATURES: Comfortable and durable sport micro sock Micro height ideal for use with sneakers or low-cut hiking boots Constructed with Merino wool to control moisture, regulate temperature and prevent odors Smartwool(R) fit system features an elasticized arch and ankle support that keeps socks in place Reinforced heel, toe and sole Light half cushion adds comfort without bulk Product Care: Machine wash and dry SIZE CHART: Sock Size: Medium = Shoe Size: Women's 7-9.5 Sock Size: Large = Shoe Size: Women's 10-12.5