The adidas UltraBoost 21 ‘Carbon Solar Red’ brings attention to the running shoe’s Boost midsole, which extends throughout the entire length and features a sleek metallic gunmetal coating. The shoe's Continental rubber outsole is accompanied by adidas' enhanced Torsion system, known as Linear Energy Push, offering optimal support and stability. Crafted with a blend of black and Carbon Primeknit materials, the upper portion of the shoe utilizes recycled Parley Ocean Plastic and provides a snug, sock-like fit. Additionally, the shoe includes a smoky midfoot cage and a silver translucent heel counter to offer lightweight support. Adding a touch of unexpected color, the adidas-branded tongue tag is presented in Solar Red.