This women's running shoe is known for its soft, cushioned ride, and now it's lighter than ever thanks to the newly added GuideRails® support technology. Brooks have shifted their focus beyond the feet to the most injury-prone part of a runner's body: the knees. GuideRails® support keeps you moving comfortably by keeping excess movement in check. Thanks to the patented BioMoGo DNA midsole, ultra-softness and durability aren’t mutually exclusive. The Ultimate Sockliner enhances comfort. Enjoy comfort front to back with a spacious yet secure fit thanks to an engineered mesh upper and conformable embroidered saddle.