EVA (ethylene vinyl acetate) upper is a high-quality, very light, elastic material with very good cushioning. As a result, it is waterproof, washable, ultra-light and smooths out slight irregularities in the floor and ensures that every step is softly cushioned Vegan Friendly Birkenstock NARROW width Slip on closure with two adjustable straps for easy on-off wear and a custom fit EVA lining for an abrasion-free environment for all-day wear Anatomically shaped EVA footbed will mould to the shape of the foot creating a custom footbed that supports and cradles every step Raised toe-bar is designed to encourage the natural gripping motion provides aid in circulation and exercise for the legs Natural heel profile and deep heel cup keeps the natural padding of the foot where it belongs, under the heel which helps distribute body weight more evenly Flexible EVA outsole offers lightweight, shock absorbing support with lasting durability Made in Germany This odour-neutral synthetic material has been tested for harmful substances and is shock-absorbent, waterproof and skin-friendly. Perfect for wearing at the beach, in the garden, or in wellness and spa areas. HEAT WARNING Cork footbeds or EVA soles can be damaged by exposure to concentrated heat. Do not leave your footwear in direct sunlight or in closed cars on warm days. If your footwear becomes wet, allow it to air dry slowly, away from direct heat. THE CORRECT FIT Open the strap(s) and step into the footbed. Be sure to have several millimetres of room for your heels and toes. Close the strap(s) comfortably around your feet. Leave enough room to allow your feet freedom of movement when you are walking Take a few steps in them (on carpet). If your feet can move freely when you are in motion and they do not hit the footbed edge, you have the correct size!