Birki Flow EVA in Color Black | BIRKENSTOCK US。Birkenstock Birki Flow EVA men’s clogs in size US 11-11.5 / EU 44 / UK 9.5 Introducing our first post-sport recovery clog, the all-new Birki Flow. Designed around the contours of our iconic footbed, the Birki Flow builds off our best-selling EVA clogs with an ultra-breathable, water-friendly style. Complete with classic BIRKENSTOCK® design cues, from the adjustable backstrap to molded buckle. - Contoured BIRKENSTOCK® footbed made from EVA -Water-friendly EVA design with breathable vents -Washable, flexible & ultra-lightweight -Made in Germany Material: Upper: EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with very good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned. Insole: EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with very good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned. Footbed material: EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with very good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned. Outsole: EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with extremely good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned.