MUSE Collection (patented) Mesh triangle accent to enhance breathability. Patented grip designed to provide excellent traction. Silicone tab inside sock heel to secure fit. Arebesk signature wash bag included with each pair- helps preserve silicone in laundry cycles and doubles as a carrying bag. Fabric Details: 75% cotton 15% spandex 10% elastane Free shipping on all orders $35 or over. Does not apply to international or overnight orders. SIZE CHART Small Medium Large U.S. Women's Shoe 6-8 8.5-10.5 11-12 E.U. Women's Shoe 36-38.5 39-42.5 - *Please refer to the size chart above to determine the correct sock size you will need.