Ankle-strap sandal with toe loop in fun patent. Fully adjustable straps for a secure fit. Upper material: Patent Birko-Flor, made of acrylic and polyamide felt fibers, a durable fabric with a smooth high gloss finish and soft lining. Footbed: The original Birkenstock footbed. Featuring a pronounced arch support, deep heel cup, and roomy toe box. Footbed molds and shapes to your foot. Sole material: EVA - Flexible, lightweight, durable and shock absorbing.