Sigvaris 505 Natural Rubber 50-60 OPEN Toe Unisex Knee High * Remarkable... numerous scientific studies have shown the medical effectiveness of the 500 Natural Rubber Series. The material has a remarkably low 1% to 2% fatigue rate, making the stocking ideal for those with serious indications or long-term therapy. * Unique... manufactured from double-covered elastodien yarn, a yarn made from soft, natural rubber and offering the greatest degree of elasticity while maintaining sustained compression throughout the day. * Easy Wear... made from a porous, extremely permeable, and highly elastic fabric which makes the stocking easy to pull on and off, even in the higher compression categories. * Durable... the knitted fabric is double-covered textured yarn, and therefore retains its shape and is extremely durable. Sold per pair. Available in beige and full sizes only. Fabric Content: 70% Nylon 30% Natural Latex Rubber the sizing wizard to quickly and accurately locate your appropriate size. Beige: S3: 505CS3O77 , S4: 505CS4O77 M3: 505CM3O77 , M4: 505CM4O77 L3: 505CL3O77 , L4: 505CL4O77