These adidas Ultraboost shoes will give you extra comfort no matter what your plans are for the day. The sock-like adidas PRIMEKNIT upper lets air flow around your foot, while the ultra-comfortable adidas BOOST midsole stays springy and comfortable even on hot days. The Stretchweb outsole keeps the ride superbly smooth on a range of surfaces. This shoe's carbon footprint has been reduced by 43%, compared to previous versions. Less greenhouse gas emissions, including CO2, for the full life cycle — from creation all the way to end-of-life. Lace closure adidas PRIMEKNIT textile upper BOOST midsole Stretchweb outsole with Continental Rubber Textile lining Carbon footprint reduced by 43%, compared to previous versions.