Sustainable product Leather Working Group Leather Working Group certified products are made from leather that comes from eco-friendly leather manufacturers. They have been inspected and certified according to the standards of the Leather Working Group. Labeled product Leather Working Group Leather Working Group certified products are made from leather sourced from eco-friendly leather manufacturers. They have been inspected and certified according to the standards of the Leather Working Group. Materials Upper : Sheepskin Lining : Sheepskin Insole : Sheepskin Sole : Rubber Mou SUEDE SHEEPSKIN CLOG ESKIMO