Technology More clouds, more energy The Cloudstratus features two layers of Helion-enriched CloudTec for increased vertical and horizontal cushioning. Connected forefoot Cloud elements are perfectly aligned with the Speedboard, resulting in big energy return, durability and road protection. Materials Start your run faster Around 75% of the polyester used in the durable and dynamic upper is recycled. With a wide-fitting forefoot and improved heel hold, topped off with a star-lacing system, the Cloudstratus is highly inclusive and ideal for all types of runners. Rubber grip in the outsole provides traction on the road. Design Double your run Maximum cushioning, maximum performance. Dare to go farther in the shoe for runners who demand more. Double Clouds meet a re-engineered midsole, a recycled upper and a redefined inner construction. It's comfort and just the right amount of support.