Birkenstock Boston Clog is a classic black clog with a slip-on design, offering extreme reliability and comfort. Manufactured from a smooth leather with a cork and latex-cored suede covered foot bed. Featuring toe bar, arch support and deep heel cup, making it ideal for regular use in the workplace environment. Material Leather uppers, cork foot bed & EVS sole. Foot bed made of natural cork and latex Pronounced medial and metatarsal arch support, toe bar and natural heel. Flexible, durable, lightweight, and shock absorbing Smooth durable leather uppers with adjustable buckle.