Designed for demanding triathletes, this rear hydration system allows you to put two bottles to the back of your saddle or a bottle and a tool bottle. Complete and robust, the kit is a very good solution for triathlons and long-distance trainings. It contains a universal rail mount bracket and 2 bottle cages, the Z2 and Z2i, as well as the screws supplied for installation. The side-opening bottle cages allow easy and quick access to the bottles. Made in France with a reinforced fibre-glass material, the cages grip the bottles very well. 2 CO2 holders are included on the Z2i.