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2021
UltraBoost 21 'Triple Black'
The adidas UltraBoost 21 ‘Triple Black’ delivers a stealthy iteration of a performance running shoe that takes advantage of more Boost cushioning and a more responsive ride than its predecessor. A flexible Primeknit upper, incorporating Parley Ocean Plastic and other recycled materials, sits atop a black Boost midsole that packs 6% more Boost capsules. Underfoot, Linear Energy Push technology provides 15% more forefoot stiffness to produce improved energy return with each step.
| Release Date | 01-28-2021 |
| SKU | FY0306 |
| Nickname | Triple Black |
| Colorway | Core Black/Core Black/Core Black |
| Main Color | Black |
| Upper Material | Primeknit+ |
| Technology | Boost |
| Category | Running |