adidas Ultra Boost 21 Vivid Red Illest popup A herringbone pattern on the

A herringbone pattern on the outsole offers traction

Lightweight cushioning arrives via a foam midsole with a Zoom Air unit in the forefoot and a visible Max Air 180 unit in the heel

Summit White

dark charcoal outsole

adidas Ultra Boost 21 Vivid Red Illest popup A herringbone pattern on 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