1.Air permeability 2.Health,softly and non-toxic 3.Environmental protection 4.Easily fits all shoe tyoe 5.Durable in use 1. Made of high qualily grade silicone material,which have FDA & ROHS approval2. More colors and fashion designs are available3. Competitive price and prompt delivery4. Good flexible,Fashion style5. Logo and models can be customized according to requirement heightening silicone ...