The Nike LeBron 21 Optimism features a psychedelic, mismatched color gradient. The left shoe fades from Bliss Pink to Laser Orange, while the right shoe displays a color gradient from Photo Blue to Vapor Green. The mesh upper boasts a 360-degree zonal cabling system for superior containment, creating an optical illusion with wavy lines. Contrasting vibrant hues are present on the Phylon midsole with Zoom Air cushioning in the heel and forefoot. A TPU shank plate provides foot support and structure. The exposed cabling system resembles oyster shell ridges, symbolizing LeBron's desire to protect his daughter. Released on May 1, 2024, for $200.