The classic Boston combines a minimalist design with maximum comfort. These clogs, made from durable and lightweight EVA, are perfect for after the gym or at the beach. We've taken this classic one step further by making them waterproof so you can wear them all year round without worrying about getting caught in the rain. Super lightweight EVA upper. Slip on style with buckle strap for a secure fit. Soft EVA footbed . Deep heel cup helps distribute body weight evenly. Lightweight EVA outsole. Please be advised that Regular accommodates Regular to Wide. Birkenstock Narrow width accommodates both traditional narrow and medium widths