Synthetic upper includes cellulosic fibers made from sustainably grown wood Lace closure Bio-based thermoplastic polyurethane shell made with 47% plant-based content This adidas BOOST midsole is made with 50% recycled material derived from production waste Lightweight thermoplastic polyurethane outsole Futuristic And Functional, You'll Be A Step Closer To A Better Planet In The Adidas By Stella Mccartney Sportswear Shoe. Inspired By Nature, The Shoe Is Crafted In Part From Natural And Renewable Materials. A Sock-Like Upper Is Set Atop A Cool, Chunky Midsole For Ultimate Comfort And Support With Every Step. Pared-Back Hues And A Fashion-Forward Silhouette Means You Can Easily Incorporate Them Into Your Everyday Wardrobe, Too.