Featuring a unique style the Hush Puppies Slippers are made of recycled polyester. The slippers can be worn for casual and semi formal outings and pair well with a versatile range of clothing and accessories. The organic cotton socks offer a soft feel and the recycled foam footbed is comfortable. The outer sole is made of natural rubber and provides a strong grip that prevents slipping., 90% Recycled RPET Polyester Upper and Lining., Super Soft Organic Cotton Sock with 100% Recycled Foam Footbed., Durable Natural Rubber Sole for Added Grip., Durable Natural Rubber Sole for added Grip.