Imagine if every run could feel like race day. The new boston 10 is the ideal companion in your personal best pursuit, where every training session counts. Lightstrike's super light, responsive cushioning has you covered on the comfort side so that nothing takes away from your time hitting the pavement. Speaking of pavement, continental™ rubber under the forefoot makes sure you stick it.This product is made with primegreen, a series of high-performance recycled materials. 50% of upper is recycled content. No virgin polyester.