Smartwool Women's Secret Sleuth II 3-Pair Pack Chocolate Socks LG (10-12.5) 74% merino wool, 24% nylon, 2% elastane Excellent for use with mary janes, ballet shoes, or boat shoes while keeping your feet loose and odor-free WOW (Wool-on-Wool) Technology is featured in the reinforced sole for excellent comfort and durability Elastic collar for easy on and off Merino wool has excellent temperature and odor regulating properties Size Large, Women's 10-12.5 US