Ultra Boost ShoesComfortable energy-returning shoes for long-distance runners.These men's running shoes are designed to help you put more miles in your run. Their plush boostâ„¢ midsole returns energy to every step. A sock-like adidas Primeknit upper hugs your foot like a second skin. A STRETCHWEB outsole adapts to the ground.Weight: 10.5 ounces (size 9); Runner type: natural; Midsole drop: 10 mm (heel: 30.5 mm / forefoot: 20.5 mm)boost™'s energy-returning properties keep every step charged with an endless supply of light, fast energySTRETCHWEB rubber outsole is lightweight and elastic, adapting to the ground for stability and working strategically to optimize the unique properties of boost™ from touchdown to push-offadidas Primeknit is carefully engineered to naturally expand with your foot while you run to give you a more comfortable fit and help reduce irritation; SOCKFIT upper for a snug, supportive fitTORSION® SYSTEM for midfoot integrity; FITFRAME 3D-molded TPU helps increase stability around the heelContinental™ Rubber outsole for extraordinary grip in wet and dry conditionsImported