Boston Essentials EVA in Color Stone Coin | BIRKENSTOCK US。DESIGN: * Upper, lining, and sole all made with one piece of EVA * Waterproof, washable, and ultra lightweight IN-SHOE COMFORT: * Anatomically shaped BIRKENSTOCK® footbed made with EVA * Deep heel cup supports the foot tissue and holds the heel bone firmly in its natural position * Heel mould activates the calf muscles, stabilizes the back of the foot, and improves gait and coordination * Added support for the interior and exterior arch * Transverse arch support runs through the middle of the footbed and stabilizes the metatarsal bone for a solid stance * Raised indentations at the front of the footbed ensure that the toes remain loose and spread out in their natural position * Drawn up footbed protects the toes during the rolling motion of the foot DURABILITY & TRACTION: * EVA outsole cushions every step and smooths out irregularities in the floor * NEW