ALPHABOOST V1cblack carbon grethr regular fit lace closure hybrid boost and bounce midsole adiprene+ cushioning "step up your weekend look in these adidas alphaboost shoes. lace them up and hit the town. a bounce midsole makes the ride soft and springy. boost on the heel returns energy as you go, so you're always light on your feet no matter where the afternoon takes you. made with a series of recycled materials, this upper features at least 50% recycled content.