Product Detail As part of our e01 project to create more sustainable footwear, these trainers, while not 100% sustainable, feature a percentage of recycled and reprocessed materials: Mesh upper ? 100% recycled PET polyesterFelt upper ? 100% recycled PET polyesterOutsole ? 10% reprocessed neon rubber specklesAll from suppliers certified by the GRS (Global Recycle Standard) Upper Material: Leather, Mesh (polyester), Felt (polyester) Lining Material: Lycra/Anti Bacterial Mesh Fastening: Laces Outsole: Slip-Resistant Rubber Technology: Microwobbleboard Standard