Proudly crafted from 90% Recycled polyester upper and lining. The Good Slipper is a must have this season with its super soft organic cotton sock and 100% recycled foam bed. Made with a durable natural rubber sole for added grip and extra comfort - 90% Recycled RPET Polyester Upper and Lining. - Super Soft Organic Cotton Sock with 100% Recycled Foam Footbed - Durable Natural Rubber Sole for Added Grip.