Inspired by space to use on Earth, the adidas Men’s Ultraboost 20 Goodbye Gravity running shoes bring with them years of innovation and research to bring you amazing confidence for miles. Partnered between the NASA and adidas , innovation in space is here to empower runners on Earth. Design: Primeknit upper new knit provides enhanced breathability and ventilation around key sweat zones under the cage and in the forefoot Primeblue construction, a high-performance recycled material containing Parley Ocean Plastic and a minimum of 40% recycled material in total In-Shoe Comfort: Boost midsole gives amazing responsive cushioning; the more energy you give, the more you get Durability & Traction: Stretchweb outsole with Continental Rubber for amazing traction in wet and dry conditions Additional Details: Shoe Type: Neutral Midsole Drop: 10.0 mm Weight: 10.9 oz