A perfect footwear for the outdoors, the Birkenstock® Kids Kay keeps your feet comfy. Synthetic upper. Suede lining. Roomy toe box allows toes to stretch out . Birkenstock's contoured footbed support kids growing feet. Convertible backstrap with a buckle closure that can swivel back for a more secure fit. Contoured cork footbed supports the arches of the foot and cradles the heel for all-day comfort. Arch support provides a steady foundation that supports good posture. EVA midsole and outsole. Made in Germany. View Zappos.com Glossary of Terms Birkenstock Kids Kay (Toddler/Little Kid/Big Kid)