Birkenstock Unisex Arizona Suede Sandal Size:40 If you plan to wear

If you plan to wear thick wool socks or want a slower break-in with thicker insoles

or the United States

with a fully wrapped midsole and a signature tongue detail

low-top lace-up silhouette

Birkenstock Unisex Arizona Suede Sandal Size:40 If you plan to wearThe Birkenstock Unisex Arizona Suede Sandal in Sandcastle is the brand's iconic two strap silhouette in a soft warm sandcastle toned suede upper. Built on Birkenstock's signature contoured cork and latex anatomical footbed. Suede gives a softer, more relaxed look than the Birko Flor or smooth leather Arizonas protect with suede spray before first wear. Fit notes: Birkenstock uses European sizing. EU 36 fits like a U. S. women's 55. 5; EU 40 like a U.