Experience unmatched comfort and support on your runs with the Adidas UltraBoost 21 'Vivid Red'. These shoes feature a Primeknit upper made from recycled Parley Ocean Plastic and zero virgin polyester, delivering a sustainable yet stylish look. A full-length Boost midsole provides responsive cushioning, while a revised Torsion system enhances stability. A Stretchweb Continental rubber outsole ensures reliable traction, mile after mile. adidas UltraBoost 21 'Vivid Red'