The UltraBoost 22 ‘Black Multi Gradient’ places the focus on the running shoe’s cushioning system. The full-length Boost midsole is rendered in a gradient finish that transitions from neon green to a vibrant shade of aqua. Underfoot, contrasting blue and pink hues are applied to the Stretchweb Continental Rubber outsole. Reflecting ’ commitment to ending plastic waste, the solid black Primeknit upper is composed of 50% Parley Ocean Plastic and 50% recycled polyester.