BOOST midsole Continental Rubber outsole Lace closure Regular fit Sleek lines. Superior performance. These adidas running shoes are a win-win for runners. The bungee laces tighten up in seconds with a toggle so there's no risk of tripping. The soft adidas PRIMEKNIT upper has been reworked to let air flow more easily around the foot, while a specially designed heel counter supports the Achilles tendon as you pick up pace. BOOST cushioning offers incredible energy return, while the all-terrain outsole gives you a secure grip on slippery surfaces. This shoe's upper is made with a high-performance yarn which contains at least 50% Parley Ocean Plastic - reimagined plastic waste, intercepted on remote islands, beaches, coastal communities and shorelines, preventing it from polluting our ocean. The other 50% of the yarn is recycled polyester.