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

breathable mesh upper

or around the gym and after workouts

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.