adidas mens Ultraboost 21 100% Textile Synthetics Imported Rubber sole Men's Ultraboost shoes for an energized run Sock-like fit; adidas Primeknit upper for support and comfort Midfoot cage and heel counter for support; Boost midsole for a responsive feel Stretchweb outsole flexes naturally for an energized ride; Continental Rubber gives you superior traction This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. Weight: 340 g, Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm)