From Birkenstock, the Arizona EVA Waterproof Essentials Family Matching Pool Slide Sandals feature: Waterproof and lightweight EVA upper slide on design with adjustable buckled straps unlined construction Birkenstock's contoured footbed supports the arches of your foot and cradles your heel for all-day comfort EVA footbed EVA outsole flat heel Imported. Styling Notes: Birkenstock footwear is made in European whole sizes. The style selected is a Birkenstock narrow footbed that will fit most medium feet.