The BIRKENSTOCK Boston is a veritable classic that can easily be worn all year round. The Boston has a legendary status thanks to its sophisticated, individual design. With its additional foam layer, the soft footbed offers extra comfort and pampers feet – all day long. The upper is made from extra thick, oiled nubuck leather with an open-selvage finish. AVOID EXTREME HEAT Like many materials found in footwear and apparel, cork footbeds and EVA soles can be damaged by exposure to concentrated heat or extreme temperatures. Do not leave your shoes in direct sunlight for extended periods or in closed cars on hot days. Keep Birkenstock footwear away from campfires, fireplaces, and indoor radiators. While we do offer a line of water friendly footwear, most styles should not be immersed in water. Over saturation can compromise the integrity of the sealant materials. It can also change the look and finish of the materials. If your shoes become wet, allow them to air dry slowly, away from direct heat. CLEAN & PROTECT Birkenstock sandals and clogs come with a light coating of cork sealer on the exposed cork edge. This protects the cork and prevents it from drying out. If the cork looks like it’s drying out, apply a thin coat of Birkenstock Cork Sealer to protect the cork from the elements. To keep your footwear fresh, spray the entire footbed with Birkenstock Cleaner & Refresher and wipe away excess moisture and dirt with a cloth. Brush suede and nubuck footbeds with a Nubuc