To make the adiZero Prime Parley, adidas teamed up with Parley for the Oceans to use yarns made from recycled waste that has been intercepted from beaches and coastal communities before it reaches the oceans. Next time you're out on your run, not only will you be enjoying the amazing comfort and responsive cushioning of Boost, you'll also be promoting ocean health and environmental responsibility. Primeknit upper wraps your foot in adaptive support that moves with the Boost midsole delivers responsive cushioning for a smooth, more flexible ride. movements of your foot. Torsion System promotes smooth transitions. Stretchweb outsole flexes naturally for an energized ride. Continental rubber adds the best traction possible. Adiwear delivers high-wear durability.