adidas Solarboost shoes size Men’s 12. Used with some light wear as seen in photos. Features a ultra-comfortable Boost midsole merged with a new upper technology called Tailored Fiber Placement. The new material is designed with precise data so its fibers are connected together perfectly, and it also features Parley material in the midfoot for extra support. Beyond the new upper technology, the Solarboost offers an updated Energy Rail in the midfoot for increased stability, and a new StretchWeb outsole design that’s designed to move in harmony with the Boost cushioning to provide a customized ride.