adidas Supernova ST - Womens - Grey Five/Night Metallic/Black : Now, experience the comfort you love about adidas boost with the stability you need to go the extra mile. The adidas Supernova ST uses Energized boost in the midsole, a zoned construction that uses varying densities of boost particles to deliver areas of responsive energy return, cushioning, and support where you need them most. The result? A more comfortable, efficient running stride. Additionally, an asymmetrical energy rail in the outsole helps guide your foot through a natural transition from heelstrike to toe-off, limiting pronation to keep you running strong. Engineered mesh upper delivers areas of breathability and structure where you need them most. Energized boost midsole uses varying densities of boost to provide areas of responsive energy return, cushioning, and support that encourage a natural, more efficient running stride. Stretchweb outsole adapts to every runner's stride, allowing boost particles to freely expand at impact and contract at toe-off, following the natural motion of your foot. Asymmetrical energy rail helps guide your foot through a smoother, more natural transition from heelstrike to toe-off. Continental rubber outsole for durable traction on any surface.