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. Anatomically designed carbon technology, with Energyrods that spring back faster during the run with lightweight stiffness. Combination of the ultra-lightweight Lightstrike Pro foam for optimized cushioning and Lightstrike EVA for durability. Product Highlights Lace closure Textile upper Lightweight mesh upper Heel padding Energy Rods Lightstrike and Lightstrike Pro cushioning Continental Rubber outsole Product Details Weight: 8.4oz / 238g Stack: 21 mm / 13 mm Heel Drop: 8mm Fit: Runs Large, Size Down Category: Speed / Carbon