These non-slip low-rise socks are made from organic cotton with a reinforced and cushioned heel and toe! These socks are a a great hygienic alternative to bulky shoes -- whether you are lounging around the house, traveling, or performing low-impact exercises such as Yoga or Pilates. Wear on the plane, in the hotel, or at Pilates or Yoga without fear of germs or fungus! These great socks offer you both a comfy and a secure alternative to ordinary socks or slippers. Sizing: Small = Women"s 4-6, Medium = Women"s 6.5-9.5 & Men"s 5-8.5, Large = Women"s 10-13 & Men"s 9-12.5