The Birki Flow model from BIRKENSTOCK is a true classic, which can be worn without problem all year round. The large air intake holes in the clog guarantee pleasant freshness for your feet. Inspired by the cork sandal, this model is made of especially light and flexible EVA rubber. EVA rubber is a premium plastic material, it has no odor or polluting substances and has many positive characteristics. It is a very modern material, light, elastic, waterproof and skin-friendly. BIRKENSTOCK anatomically shaped EVA rubber insole Upper material: EVA Insole top layer: EVA Sole: EVA Details: waterproof, washable, very light