These colorful rubbers are made of non-toxic silicone and die molded in many different colors and fun shapes.Because they are made of 100% silicone. They will return to their original shape and size when you take them off. 1.Made in 100% pure silicone,softness,excellent abrasion resistance. 2.Excellent protection on nature,eco-friendly. 3.Shapes:have a great variety of models and the latest design 4.Non-stick finish, excellent water-proof,unbreakable easy to keep its shape. 5.Available for any colors,and welcome customized design. 6.All the themes of silly band can be manufactured in scented and glowing in dark. 7.Get the RoHS compliant, and also passed the EN71 8.Through secondary sulfidation