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2021
UltraBoost 21 'Grey Sonic Ink'
| Release Date | 08-31-2021 |
| SKU | S23871 |
| Nickname | Grey Sonic Ink |
| Colorway | Grey Five/Core Black/Screaming Green |
| Main Color | Grey |
| Upper Material | Primeknit |
| Technology | Boost |
| Category | Running |
| Release Date | 08-31-2021 |
| SKU | S23871 |
| Nickname | Grey Sonic Ink |
| Colorway | Grey Five/Core Black/Screaming Green |
| Main Color | Grey |
| Upper Material | Primeknit |
| Technology | Boost |
| Category | Running |