adidas Ultra Boost 21 Vivid Red OSW Other symbolic elements include the

Other symbolic elements include the ‘i’ on the heel

Black laces

The Green Glow version elevates the classic with its vibrant accents

and a tonal Swoosh accented in white

adidas Ultra Boost 21 Vivid Red OSW Other symbolic elements include theThe adidas Ultra Boost 21 Vivid Red offers the responsive running technology expected of Ultra Boost 21 models in a bold colorway of Vivid Red and Core Black. Although a streak of Core Black can be found dashed across the midsole and on the tongues adidas Trefoil logo tag, Vivid Red is the dominant color. The upper is crafted with Primeblue, a breathable, synthetic material made from plastic debris reclaimed from the ocean. Plastic overlays reach