Sigvaris 504 Natural Rubber 40-50 OPEN Toe Grip Thigh * Beaded silicone grip-top * 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 only. Fabric Content: 70% Nylon 30% Natural Latex Rubber Catalog Numbers: Beige: S1: 504NS1O77 , S2: 504NS2O77 , S3: 504NS3O77 , S4: 504NS4O77 M1: 504NM1O77 , M2: 504NM2O77 , M3: 504NM3O77 , M4: 504NM4O77 L1: 504NL1O77 , L2: 504NL2O77 , L3: 504NL3O77 , L4: 504NL4O77