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2021
UltraBoost 21 'Halo Silver'
The adidas UltraBoost 21 ‘Halo Silver’ treats the lightweight running shoe to a subdued greyscale makeover, one that allows the sneaker’s performance capabilities to claim the spotlight. They include a reconfigured Boost midsole that packs 6% more Boost capsules than the shoe’s predecessor, along with a revised Torsion system that increases forefoot rigidity to deliver a more responsive run. Up top, the knit upper continues adidas’ sustainability efforts with the inclusion of Parley Ocean Plastic and other recycled high-performance materials.
| Release Date | 01-28-2021 |
| SKU | FY0432 |
| Nickname | Halo Silver |
| Colorway | Halo Silver/Grey Two/Solar Yellow |
| Main Color | Grey |
| Upper Material | Primeknit+ |
| Technology | Boost |
| Category | Running |