The adidas UltraBoost 21 'Vivid Red' is a sustainable performance running shoe that offers a sleek, monochromatic design. Crafted with the environment in mind, the shoe boasts a crimson Primeknit upper which is made from recycled Parley Ocean Plastic with zero virgin polyester. Completing the look is a full-length Boost midsole that matches the bold finish of the upper. The updated Torsion system, known as Linear Energy Push, features striking black detailing that enhances the shoe's appearance while reducing forefoot flexibility for a more responsive and comfortable running experience. To ensure reliable traction, the shoe is equipped with a Stretchweb Continental rubber outsole. With its combination of style, sustainability, and performance, the adidas UltraBoost 21 ‘Vivid Red’ is a standout choice for runners looking to make a positive impact on the environment.