ADIDAS Men's PureBOOST running shoes feature a knit upper with double-folded knit tongue. Lace-up front for a secure fit. Removable molded sock-liner. boost midsole technology provides responsive cushioning and high energy return. Adaptive arch hugs your foot for a fit that molds to the shape of your foot. STRETCHWEB rubber outsole flexes underfoot for an energized ride.