Primegreen: This product has been made with Primegreen: a series of high-performance recycled materials. HEAT.RDY: KEEP COOL. Our cooling technologies and materials keep your feet feeling cool even in the biggest heat. BOOST: BOOST technology combines superb cushioning and energy return with every step and jump, fueling the athlete with endless energy. BB Fit: Stand out in these running shoes. The responsive Boost midsole is segmented so it moves naturally with every step. A super breathable open mesh upper keeps air circulating as you move through your daily miles. The shoes are made of Primegreen recycled material, part of adidas' commitment to use only recycled polyester by 2024.