| Model | adidas UltraBoost 21 |
| Known as | "Black Multicolor" |
| Brand | |
| Release date | October 7, 2021 |
| Colorway | Black / Red / Green |
| Colors | Black, Red, Green, Yellow, White |
| Style code | GY5555 |
| Rating | |
| Type | Original, General Release |
| Gender | Men's |
| Sport | Running |
Added June 11, 2025 at 1:21:55 PM, Updated December 12, 2025 at 4:51:27 AM
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