Birkenstock x Song For The Mute Super Birki 2.0 silhouette Polyurethane upper and outsole Waterproof and water-repellent construction Co-branded Song For The Mute x Birkenstock rivet on the side Slip-on style Cork-latex footbed Softened rubber non-slip tread base Style: br1032409 Color: Cork Brown Material: Polyurethane