adidas UltraBoost 21 'Grey Sonic Ink' S23871
Introducing the adidas UltraBoost 21 'Grey Sonic Ink' S23871, the pinnacle of running innovation and style. Its Primeknit+ upper ensures breathability and support, while the Boost midsole provides unrivalled energy return. The Continental™ Rubber outsole offers exceptional grip, making these shoes perfect for any terrain. Experience the future of running with the UltraBoost 21, available now in a striking 'Grey Sonic Ink' colorway.
US | UK | EU | JP |
---|
3M | 2.5 | 35 | 21 |
3.5M | 3 | 35 1/2 | 21.5 |
4M | 3.5 | 36 | 22 |
4.5M | 4 | 36 2/3 | 22.5 |
5M | 4.5 | 37 1/3 | 23 |
5.5M | 5 | 38 | 23.5 |
6M | 5.5 | 38 2/3 | 24 |
6.5M | 6 | 39 1/3 | 24.5 |
7M | 6.5 | 40 | 25 |
7.5M | 7 | 40 2/3 | 25.5 |
8M | 7.5 | 41 1/3 | 26 |
8.5M | 8 | 42 | 26.5 |
9M | 8.5 | 42 2/3 | 27 |
9.5M | 9 | 43 1/3 | 27.5 |
10M | 9.5 | 44 | 28 |
10.5M | 10 | 44 2/3 | 28.5 |
11M | 10.5 | 45 1/3 | 29 |
11.5M | 11 | 46 | 29.5 |
12M | 11.5 | 46 2/3 | 30 |
12.5M | 12 | 47 1/3 | 30.5 |
13M | 12.5 | 48 | 31 |
13.5M | 13 | 48 2/3 | 31.5 |
14M | 13.5 | 49 1/3 | 32 |
14.5M | 14 | 50 | 32.5 |
15M | 14.5 | 50 2/3 | 33 |
16M | 15 | 51 1/3 | 33.5 |
17M | 16 | 52 2/3 | 34.5 |
18M | 17 | 53 1/3 | 35 |
19M | 18 | 54 2/3 | 35.5 |
20M | 19 | 55 2/3 | 36 |
Novelship employs a strict verification process where each product is unboxed to allow thorough inspection of the product, including the packaging, exterior appearance, interior components, and accessories. Defects and imperfections are flagged, and our authentication team determines the legitimacy of each product before final approval.
You are responsible for any return shipping costs. We will provide a return address after the request is confirmed by the Novelship Customer Specialist team.
Please contact our customer service team before returning any product. For further information, please refer to our Term and Conditions.
Requests for size exchanges can only be made within 30 days of the shipping date and are subject to availability.
Please contact our customer service team before returning any product.
For further information, please refer to our Term and Conditions.
Introducing the adidas UltraBoost 21 'Grey Sonic Ink' S23871, the pinnacle of running innovation and style. Its Primeknit+ upper ensures breathability and support, while the Boost midsole provides unrivalled energy return. The Continental™ Rubber outsole offers exceptional grip, making these shoes perfect for any terrain. Experience the future of running with the UltraBoost 21, available now in a striking 'Grey Sonic Ink' colorway.