XLAB wants you to be able to make use of their helpful rear hydration systems no matter your saddle. For triathletes who use the ISM Adamo saddle, the XLAB Delta 425 Rear Hydration System has been designed to be compatible with the saddles that have transition hooks, such as the Adamo Attack and PN1.1 models. The Delta Rear Hydration System mounts onto the saddle rails so that they stay in your draft and can even increase the effectiveness of your aero position by filling in the void behind you, smoothing out your airflow. It is a strong, sturdy mount so that you won’t feel any sway in the back, and it will be able to withstand the abuse rear carriers can take in the transition sections of races. XLAB uses Loctite and locknuts, to ensure that the screws are locked in place safely and securely. Using Loctite also means that you won’t be subjected to a lot of noisy hardware vibrations even over the roughest roads. The funnel-shaped cage allows for easy access to your bottle. Please note that this product comes with a standard Gorilla cage and NOT a Gorilla XT cage. Whether you want to hide your bottles from the wind, or carry an extra rear bottle to refill your Torpedo Aero Bar water bottle, the XLAB Delta 400 Rear Hydration System will give you the option of being able always to have your favorite drink mix without stopping at the gas station in the middle of nowhere. It comes with an XLAB aluminum Cage Mount and a Gorilla Cage. You also have the option of carrying with you the Multi-Strike Repair Holder. It is compatible with the Aero Pouch 300 as well.