Feel good, run fast, do better. It's a cycle. Add bounce to your run with the Ultraboost Light running shoes. The lightest and most responsive Ultraboosts yet, they're also made with a lower footprint than previous versions. The magic lies in the Light BOOST midsole, a new generation of adidas BOOST with even more energy return. This pair is specifically tailored to the female form, with a narrower heel fit plus lower instep curve designed to reduce heel slip and blisters. MADE WITH A LOWER FOOTPRINT This product was designed to have a lower carbon footprint compared to a previous version. From raw material extraction, processing, packaging, all the way to the end of product's life, we calculate its carbon footprint, conforming to an internationally recognized standard: ISO 14067. This product has a total impact of 8.6 KG C02e / pair and an average reduction percentage vs. previous version of -16% .