Birkenstock Unisex Madrid Birko-Flor Sandal Size:41 It's built with a 17mm

It's built with a 17mm Twinface sheepskin upper

Earth designs around the philosophy of negative-heel construction and Pilates-inspired alignment — each step engages your core and posture muscles slightly more than a flat shoe

Double stretchy gore inserts dial in a secure

now worn by everyone

17mm sheepskin lining for warmth

Birkenstock Unisex Madrid Birko-Flor Sandal Size:41 It's built with a 17mmThe Birkenstock Unisex Madrid Birko Flor Sandal in White is the brand's classic single strap sandal in a clean white Birko Flor upper. Minimalist single strap design with an adjustable buckle, built on the brand's iconic contoured cork and latex anatomical footbed. The Madrid was one of Birkenstock's earliest silhouettes (introduced 1963) and remains a low profile favorite. Fit notes: Birkenstock uses European sizing. EU 36 fits like a U. S. women's