1.100% silicone rubber . 2.FDA,LFGB,SGS,ROHS approved . 3.Eco-friendly,waterproof . 4.Heat resistant . 5.Silicone usb case. Portable and Durable Silicone Usb CaseFeatures:1.100% high quality silicone rubber .2.Certifications:FDA, SGS ,LFGB,ROHS.2.Eco-friendly ,waterproof and healthy .3.Heat resistant and no harm to body.4.OEM service is welcome .5.Any color and design are available ,customized ...