Birkenstock Boston Narrow Fit mules in black suede combine an adjustable buckle with the brand’s anatomical cork footbed for all-day support. Product image is indicative Key attributes: Black | Suede | Anatomical cork footbed | Adjustable buckle strap | Slip-on style | Round toe | Decorative buckle detail | Branded cork footbed | Flat rubber sole | Dimensions & fit: Narrow fit | Composition & care: Upper: Suede | Lining: Suede | Footbed: Cork | Outsole: Synthetic rubber | Clean with a suede brush or specialist suede cleaner; avoid soaking; wipe outsole with a damp cloth.