Designed for cold-weather city runs, the adidas PureBoost RBL combines performance tech with features that defy the elements. This 'Core Black' sneaker has a water-repellent, knit upper with reflective elements to help keep runners dry and visible. The full-length Boost midsole delivers an ultra-responsive ride, while the all-terrain, Stretchweb outsole delivers traction—even on wet, slippery surfaces.