Our Go-To-Shoe is turning 20 and isn't slowing down. The men's Brooks Adrenaline GTS 20 offers a new, integrated GuideRails support that is smoother than ever while just-right cushioning softens every step. New streamlined, engineered mesh upper with 3D Fit Print offers the structure and proven fit the Adrenaline is known for - without the excess bulk. GuideRails keep you moving comfortably by keeping excess movement in check and protecting the knees. Responsive BioMoGo DNA cushioning stacked above a soft DNA LOFT Crash Pad work together to provide a touch of spring underfoot while cushioning each footfall.