The Brooks Racer ST 5 running shoe is light enough for shorter distances such as a 5K but sturdy enough to get you through a marathon with its lightweight construction helping you to get your time as fast possible. The inclusion of BioMoGo means that you can revel in long lasting cushioning allowing your legs to stay fresher for longer. Excellent support with lightweight feel and flexibility come from its midsole construction featuring Rearfoot HydroFlow ST, full-length BioMoGo, now non-toxic and more environmentally friendly, a universal platform, DRB, and DRB Accel. More precisely, rearfoot HydroFlow uses viscous fluid units to attenuate shock and dampen impact and the S-257 Cushsole is a durable and energy-efficient midsole compound that utilises an insole board for even more cushioning and flexibility. The combination of HPR green, forefoot stable pod construction and contact rubber forefoot in the outsole with Element Mesh, microfibre and synthetic overlay materials in the upper provide excellent ventilation, traction and extended comfort.