Innovative Primeknit+ with Tailored Fibre Placement brings a precision fit to the upper of a performance running shoe set on propulsive Boost cushioning. Supportive elements in the heel and sole promote distraction-free energy return with every stride, while grippy webbed rubber brings traction to the tread without added weight. Style Name: Ultraboost 20 Running Shoe (Men). Style Number: 5890457 5.