Experience epic energy with the new Ultraboost Light, our lightest Ultraboost ever. The magic lies in the Light BOOST midsole, a new generation of adidas BOOST. Its unique molecule design achieves the lightest BOOST foam to date and boasts a 10% lower carbon footprint than previous models (for more information see FAQs below). Specifically tailored to the female form, Ultraboost Light features a narrower heel fit plus a lower instep curve designed help to reduce heel slip and blisters. With ultimate cushioning, comfort and responsiveness, some feet really can have it all.