The Vital Bike Hydration rucksack from the quality brand Thule is specially designed for journeys of 2 - 5 hours. The rucksack has a special ReTrakt system, with which you can drink without slowing down your journey. After use, the drinking hose automatically returns to its place thanks to the ingenious magnet system. The rucksack offers enough space for some extra clothing, food, or other items. Thanks to the optimum weight distribution, you use less muscle power while cycling. The Hydrapak reservoir has a capacity of 1.75 L and has sufficient capacity for a medium ride on the bike. The use of ventilating materials creates a good air flow and ensures that you will not perspire excessively on your back. In the inner compartment, you can safely store your phone and other valuable items. Thanks to the reflective details, you will still be visible in low light.