adidas Ultraboost 19 Men's Running Shoes Core Black/Grey/Shock Cyan : The brand new adidas Ultraboost 19 brings back our favorite features from the debut Ultraboost and adds new design and structural elements to make this edition of the high-performance running shoe the best yet. This update features the seamless knit upper and second-skin fit we know works perfectly for avid runners because of its motion weave technology that comfortably holds the foot in place. What's New?! This new Ultraboost 19 offers runners 20% more energy return than the original model as well as a new torsion spring that covers the full length of the shoe. Adidas took care in adding a new 3D Heel Frame that provides the support that runners need around the heel for optimal performance. Shoe Composition Upper: Unique Primeknit 360 upper material provides a natural, adaptive fit and great performance by allowing for stretch while supporting the foot. The 3D fitcounter is a molded heel counter that provides a natural fit for optimal movement of the Achilles. Mesh reinforcements around the shoe's eyelets for a more durable lacing and structurally sound fit. Midsole: Full-foot boost(TM) midsole provides unmatched energy-return and superior cushioning. Torsion Spring technology is integrated into the midsole to provide support during landing and at take-off. Outsole: The Stretchweb rubber outsole provides enhanced cushioning, durability, and smooth transitions.