The Nike LeBron 21 'Optimism' features mesh uppers in mismatched gradient designs. A blend of Laser Orange and Laser Fuchsia covers the left shoe, while a combination of Photo Blue and Vapor Green distinguishes the right shoe. A 360-degree zonal cabling system provides enhanced containment and contrasting pops of color. The vibrant hues continue on the lightweight Phylon midsole, fitted with a TPU shank plate and Zoom Air cushioning in the forefoot and heel.
| Release Date | 05-01-2024 |
| SKU | HF5353 400 |
| Nickname | Optimism |
| Colorway | Photo Blue/Vapor Green/Laser Orange/Laser Fuchsia |
| Main Color | Multi-Color |
| Upper Material | Mesh |
| Technology | Zoom Air |
| Category | Basketball |