Y-3 brings its sleek and stylish aesthetic to the Ultraboost 21. In all-black, it features uppers made from Primeknit textile and a luxe leather lining to ensure a premium fit. A boost™ midsole and Continental™ rubber outsole work together to provide cushioning and stability.
US | EU | Japan | |
---|---|---|---|
UK 4 | 4.5 | 36 2/3 | 22.5 |
UK 4.5 | 5 | 37 1/3 | 23.5 |
UK 5 | 5.5 | 38 | 23.5 |
UK 5.5 | 6 | 38 2/3 | 24 |
UK 6 | 6.5 | 39 1/3 | 24.5 |
UK 6.5 | 7 | 40 | 25 |
UK 7 | 7.5 | 40 2/3 | 25.5 |
UK 7.5 | 8 | 41 1/3 | 26 |
UK 8 | 8.5 | 42 | 26.5 |
UK 8.5 | 9 | 42 2/3 | 27 |
UK 9 | 9.5 | 43 1/3 | 27.5 |
UK 9.5 | 10 | 44 | 28 |
UK 10 | 10.5 | 44 2/3 | 10.5 |
UK 10.5 | 11 | 45 1/3 | 29 |
UK 11 | 11.5 | 46 | 29.5 |
UK 11.5 | 12 | 46 2/3 | 30 |
UK 12 | 12.5 | 47 1/3 | 30.5 |
UK 12.5 | 13 | 48 | 31 |
If for some reason you are not happy with your purchase you can return it to us within 14 days for an exchange or refund.
For more information please visit our returns page