Materials Vamp: 100% Recycled Polyester Quarter: 100% Polyester Tongue: 100% Recycled Polyester Collar Lining: 100% Recycled Polyester Vamp Lining: 100% Recycled Polyester Weight: 300g Nylon-blend Speedboard® for momentum & powerful take-offs Biggest-ever CloudTec® = an extra cushioned running shoe Max cushioning, max energy return Reworked dual-density Helion™ superfoam adds bounce Speedboard® made from nylon blend and shaped for propulsion Foam insert in the forefoot to absorb impact We prioritize customer satisfaction above all else. Here’s what our valued customers have to say about their experiences with us: (SEE REVIEWS)