1.The shoe covers are waterproof, rainproof, anti-sand 2.Silicone material ,no odor 3.Imitating tire grain pattern, non-slip design 4.The 4th generation upgrade, thick design, wear resistance. The product is heavier than other style shoe covers 5.Shoe covers are flexible ,can pull. For outdoor only, do not use in indoors smooth tile floor, galss, metal and other smooth floor. Avoid sharp object while wearing shoe cover. The shoe cover is flexible, please choose according your right size .Do not over pull. It is not recommended for old people ,pregnant women and children. Warning:t his is not a toy, to avoid danger of suffocation, keep the shoe cover away from babies and children. Covers Pattern Type: Geometric Size:24.5*0.5*17cm Fits: men women teenagers Material: Silicone Package Contents: 1 pair of shoe covers Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.