Birkenstock Women's Arizona EVA Sandal in Black ALT text Wool is a natural insulator:

Wool is a natural insulator: it keeps your feet warm in the winter and cool in the summer

This internal support mechanism is anatomically engineered to provide excellent arch support and cradle the natural contours of the foot

and up the Achilles to keep feet comfortable for miles and miles

Washable waterproof leather upper

Leather lined upper

Birkenstock Women's Arizona EVA Sandal in Black ALT text Wool is a natural insulator:The legendary two strap design from BIRKENSTOCK the Arizona. Modeled on the cork original, this sandal is made from ultra lightweight and highly flexible EVA. These sandals are shock absorbing, waterproof, and skin friendly. Wear them at the beach, in the garden, or around the gym and after workouts. It's the perfect addition to your classic BIRKENSTOCK sandals. Anatomically shaped BIRKENSTOCK footbed made from EVA Upper lining sole: one piece molded