Birkenstock - Birkosport - Arch Support for Sport Shoes
A two-piece system that offers support and cushioning. On the bottom is a 3/4-length arch support made from natural cork/EVA. The full length blue innersole is made from EVA foam (BirkoCell) that fits inside the arch support to absorb shock and provide addional support. Arch Flexible lightweight support. Heel Cup stabilizes and supports foot. Contoured arches support instep and ball of foot; distributes impact. Toe bar exercises feet and leg muscles. Metatarsal build up provides extra cushioning under the ball of the foot.