and a lightweight patent pending EVA outsole for long-lasting wear

Suede leather detailing

the Sky is constructed from recycled mesh uppers treated for stain resistance and an EVA outsole made from 55% I’m Green bio based EVA

adjustable straps and a contoured cork footbed that forms to the shape of your foot

BOSTON EVA Color:Black and a lightweight patent pendingThe BIRKENSTOCK Boston is a veritable classic that can easily be worn all year round. The Boston has a legendary status thanks to its sophisticated, individual design. Shown in EVA, a synthetic waterproof and lightweight material. Super lightweight great for after the gym or the beach.