Our best-selling clog in an ultra-lightweight style. The Boston EVA is made from water-friendly material, giving you a flexible design built on the contoured footbed you love most. The perfect pair for pre-workout, post-practice and all the rest days in between. Contoured footbed for legendary BIRKENSTOCK support Style made from single piece of EVA Water-friendly, flexible & lightweight Adjustable strap with tonal pin buckle Made in Germany Upper: EVAEVA (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: EVAEVA (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: EVAEVA (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: EVAEVA (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.WOMEN SIZES EU US UK mm 35 4-4.5 2,5 225 36 5-5.5 3,5 230 37 6-6.5 4,5 240 38 7-7.5 5 245 39 8-8.5 5,5 250 40 9-9.5 7 260 41 10-10.5 7,5 265 42 11-11.5 8 270 43 12-12.5 9 280 MEN SIZES EU US UK mm 39 6-6.5 5,5 250 40 7-7.5 7 260 41 8-8.5 7,5 265 42 9-9.5 8 270 43 10-10.5 9 280 44 11-11.5 9,5 285 45 12-12.5 10,5 290