Boston EVA in Color Black | BIRKENSTOCK Germany。Introducing Birkenstock\'s first recovery clog, this lightweight style features a contoured footbed that puts familiar comfort under each step. Side vents ensure breathability and a washable design means you can keep it looking clean trek after trek. • Adjustable slingback strap with buckle closure • Contoured footbed • Synthetic upper, lining and sole • Made in Germany Lightweight EVA construction. Slip-on clog with adjustable strap. Cushioned footbed for comfort. Vent holes for breathability. Durable, easy-care design.