Premium arch support and sculpted heel cup for stability and support provide proper alignment to help prevent and reduce foot pain. Soft upper strap. Slip-resistant and non-marking sole. Waterproof and machine washable - color won't fade. Bio-based material contains 45% soy by weight and is BPA, latex, rubber, and phthalate-free. Vegan and cruelty-free. 100% recyclable (plastic symbol #3) and made from a blend of used shoes, scrap material, and our own proprietary bio-based material. Sustainably made in the USA