Unit: Anatomically shaped BIRKENSTOCK footbed made from EVA | Upper/Lining/Sole: One unit. Lightweight EVA | Details: Thong, with an individually adjustable EVA buckle. Waterproof, washable, ultra lightweight | Care: Avoid extreme heat. Wipe with mild soap and water | Warranty: Guaranteed against faulty workmanship or defective materials for 6 months from date of purchase. Does not cover normal wear and tear and negligence or misuse of the product. Please note care instructions | Made in Germany.