Train at top speed in these Hyperion running sneakers Lightweight mesh upper offers increased breathability Holistic GuideRails support system supports your body in its natural motion path while keeping excess motion in check DNA Flash v2 nitrogen infused cushioning offers protected comfort and speed while being 10% more responsive Increased stack height, with 2mm added to forefoot High-rebounding, durable, lightweight RoadTack rubber outsole made with recycled materials Made with recycled materials equivalent to 6 plastic water bottles Brooks Women's Hyperion GTS 2