Adidas Pureboost 21 Athletic Shoes Black/Multi GY5103 Mens 。Adidas Pureboost 21 GY5103 men’s running shoes. PUREBOOST The simplest expression of adidas performance running, the Pureboost is a training shoe designed for short distances and everyday use. ENDLESS ENERGY adidas BOOST delivers incredible energy return and instant comfort with each step to keep you going. EXTERNAL HEEL COUNTER An external heel counter locks down the foot for a secure fit. RESPONSIVE RUNNING SHOES MADE IN PART WITH RECYCLED MATERIALS. For quick morning miles and more. These adidas Pureboost performance running shoes are so simple, you\'ll want to wear them beyond your daily run. With responsive BOOST, the comfort is clear as soon as you slip them on. The soft knit upper comes with an external heel counter that locks your foot in place as you run down that last hill. Regular fit Lace closure Textile upper BOOST midsole Textile lining Rubber outsole Black, yellow, green, white and blue colors New with tag. No box.