Birkenstock Boston Eva W Flip-Flops Properties: The BIRKENSTOCK Boston is a true classic that can be worn all year round. Thanks to its refined design and customizable fit, the Boston has long enjoyed legendary status. Modeled after a cork sandal, it is made of particularly lightweight and highly flexible EVA plastic. High-quality EVA plastic is odorless and tested for possible contaminants and combines many properties: it is very light, flexible, shock-absorbing, water-resistant and skin-friendly. Anatomically shaped BIRKENSTOCK footbed made of EVA foam Upper material, insole, sole: EVA foam from a single cast Details: water-resistant, washable, very light “Made in Germany”;Properties: The BIRKENSTOCK Boston is a true classic that can be worn all year round. Thanks to its sophisticated design and individual adjustment options, the Boston model has long enjoyed legendary status. Modeled on a cork sandal, this model is made of particularly light and very flexible EVA plastic. High-quality EVA plastic is odorless and tested for possible contaminants and combines many properties: it is very light, flexible, shock-absorbing, water-resistant and skin-friendly. Anatomically shaped BIRKENSTOCK footbed made of EVA foam Upper material, insole, sole: EVA foam from a single cast Details: water-resistant, washable, very light “Made in Germany” Material: EVA EVA (ethylene vinyl acetate copolymer) is a high-quality, very light, flexible material that provides very good shock absorption. This smoothes out minor surface irregularities and provides gentle cushioning for every step.;Properties: The BIRKENSTOCK Boston is a true classic that can be worn all year round. Thanks to its sophisticated design and individual adjustment options, the Boston model has long enjoyed legendary status. Modeled on a cork sandal, this model is made of particularly light and very flexible EVA plastic. High-quality EVA plastic is odorless and tested for possible contaminants and combines many properties: it is very light, flexible, shock-absorbing, water-resistant and skin-friendly. Anatomically shaped BIRKENSTOCK footbed made of EVA foam Upper material, insole, sole: EVA foam from a single cast Details: water-resistant, washable, very light “Made in Germany” Material: EVA. EVA (ethylene vinyl acetate) is a high-quality, very lightweight, flexible material that provides excellent shock absorption. This smooths out minor surface irregularities and provides a gentle cushioning effect with every step.