Brooks Adrenaline GTS 21 is the running shoe for you that wants excellent comfort and extra stability. Adrenaline is for the overpronating runner with even more DNA LOFT-midsole material than previously, which provides increased comfort. At the same time, the GuideRails-technology ensures guidance for your step development in the most graceful way. About Brooks Adrenaline GTS 21 Stability shoe For the overpronating runner 12 mm drop Best suited for volume training The prefered surface is firm Upper The shoes upper is made of a breathable 3D printed mesh material that offers optimal hold around your foot and excellent breathability, keeping your feet cool and comfortable. Moreover, it features a padded heelcap and tongue, allowing for the best comfort. Midsole The midsole on the Brooks Adrenaline GTS 21 features even more of Brooks' soft DNA LOFT-material than previous versions of the shoe. Besides being soft, this material is incredibly durable and responsive when running in the shoe. The inner of the shoe's midsole consists of Brooks BioMoGo DNA that is a firm EVA-foam that provides support and stability to your foot in the areas where it is most needed. The midsole also features the Brooks GuideRails-system that gracefully guides your hip, knee and ankle through your foot settlement. Outsole The shoe's outsole is reinforced with an extra layer of durable rubber to increase its durability and provide a better surface grip.