Primegreen: This product has been made with Primegreen: a series of high-performance recycled materials. Primegreen: THis product has been made with Primegreen Primegreen: This product has been created with recycled content Primegreen: Made with recycled materials. STRETCHWEB OUTSOLE: Stretchweb outsole flexes naturally for an energised ride, while Continental Rubber gives you superior traction STRETCHWEB OUTSOLE: Minimized Stretchweb outsole will provide better comfort & grip on multiple urban surfaces and will also allow the foot to move in harmony with boost for an adaptive and flexible ride SOLAR PROPULSION RAIL: symmetrical energy rail works with boost to increase stability for a smooth run Full Length Boost: midsole provides the comfort of your favorite BOOST sneakers and eliminates cleat pressure Built for training and race day, these men's running shoes give you targeted breathability and support. The upper is made with Primegreen, a series of high-performance recycled materials. Underfoot, responsive Boost cushioning, L.E.P and a Continental Stretchweb outsole work together to provide a smooth, energised ride.