These Birkenstock Gizeh Eva sandals are incredibly lightweight, featuring a durable EVA construction. They include an adjustable strap with brand detailing, a toe post for a secure fit, and a comfortable arched midsole, making them ideal for all water activities. The modern Gizeh thong sandal is a classic design with unique arch support and a refined, minimalist aesthetic. Its waterproof and washable footbed is ergonomically contoured to support a healthy foot shape, promoting correct posture and gait. Upper Material: EVA, Lining Material: EVA, Sole: EVA, Fastening Type: Adjustable Buckle. These sandals are made of synthetic materials.