Extremely durable, the Super Birki is light in weight but superior in comfort. Made from birki-foam, Super Birki's are ideal for domestic use such as in the garden and around the home. Abrasion, acid and grease resistant Waterproof clog and water resistant footbed Patented outward angle heel Replaceable cork and latex footbed with linen lining A layered cork and latex footbed with anatomically designed contours for support and comfort and a microfiber lining which can be wiped down, however cannot be washed by hand or machine.