Hydrate faster, ride faster, race faster.Speedfil Hydration Systems are continuously tested and refined for both professional and amateur athletes who simply want to perform at their best.These inventive and patented systems deliver hydration, aerodynamics, safety and ease of use.The F1 SpeedfilTM Hydration System is a revolutionary cycling product designed to enhance athlete hydration and aerodynamics. The wind tunnel developed, frame mounted system, smoothes airflow around the frame while the rider is in motion. The rider is able to maintain an aerodynamic position all the while drinking up to 40 ounces (1.2 liters) of fluid. Hydration is immediate as a bite valve and tubing keep fluid at the ready for whenever it is needed.Other unique features of the F1 include user ability to refill the system on-the-fly, which minimizes the need for additional bottles, as well as a unique dual splash resistant opening that allows for rapid refills with minimal fluid splashing.Aerodynamic – Wind tunnel developedEasily refillable on the fly40oz. + fluid capacity (1.2 liters)Frame Mounted to optimize handling (low center of gravity) and minimize dragExclusive dual splash resistant designHands free drinkingBite valve holds fluid at the readyLess weight and clutter than multiple bottlesMOUNTING REQUIREMENT: The Speedfil F1 requires standard water bottle cage mounts on the down tube portion of the bicycle frame for proper installation.