Differential durometer zones balance cushioning and energy return strategically.

The Birkenstock Birki Flow EVA, a true classic for any season, features ample air vents to keep your feet feeling fresh. Taking after the cork sandal, it's crafted from the ultra lightweight and extremely flexible EVA material. This premium, odor-free EVA is fashionable, lightweight, flexible, waterproof, and gentle on your skin.

Poroelastic compounds dampen vibration frequencies from hard surfaces.