The new Adrenaline GTS 19 are in stock! Brooks has shifted the focus beyond the feet to the knees by incorporating the GuideRails holistic support system to this new version. Acting like bumpers in a bowling alley, the GuideRails keeps you moving comfortably by keeping excess movements in check. In addition, the DNA LOFT and BioMoGo DNA cushioning work together to provide a balance of softness and responsiveness.