Taken from the Sperry website... "Product Details Face the weather in the Cold Bay Rubber Chelsea. This classic slip on style features a waterproof upper and duck shell and a microfleece liner, so you can stay warm and dry in style. Plus, a trendy lug outsole with our signature Wave-Siping™ technology enhances traction, while front and back tabs make it easy to pull them on. Materials Material Upper: Waterproof rubber shell Lining Material: Microfleece Sole: Non-marking rubber lugged outsole with molded Wave-Siping™ technology for wet/dry traction Features Chelsea Rain Boot Round Toe Lug Sole Slip-on Removable cushioned footbed Waterproof Measurements Heel Height: 1'' " Color Olive / Black * new and unworn without tags or box.