The XLAB Delta 400 XT Rear Hydration System is an efficient and aerodynamic way to carry your spare bottle. You can even adjust the cage angle and height for a custom position. Sometimes on a long ride, extra water is needed, and this cage allows you to tuck it behind you, keeping it from impeding aero performance. The XT version of the Delta comes equipped with a Gorilla XT cage which features 14 pounds of grip. This lightweight carbon cage offers stable mounting and an anti-vibration design as the stiffest cage on the market. The XLAB Delta 400 XT Rear Hydration System is the perfect way to carry an extra bottle.