CAcB Women's Low Cut No Show Socks w/ Silicone Heel Grip Pack 10 Lace cover - Dainty and feminine 75% Cotton - Cotton bottom absorbs sweat. 25% Spandex - Elastic closure & single layer sock provides a second skin feel.HUG your feet perfect. Non-slip silicone grips around the heel and sole to keep socks in place Designed to be truly hidden to the visible eye for open shoes especially, say, ballet shoes, pumps, high-heel shoe, sneakers,or high heels, etc. Fits US size 5.5-9. PS.FBA Shipment is Available on the item marked as "Fulfilled by Amazon". And Regarding items marked as "Ships from and Sold by Well-done", FREE SHIPPING is available.