The Thule Vital 6L hydration backpack features an included 2.5-liter Hydrapack reservoir so you don’t go thirsty, an expandable cargo space designed to fit all the gear you need, and a well ventilated back panel to keep you cool. As comfortable on the trail as it is navigating around town, the Vital 6L ensures an optimal weight distribution thanks to the low centre of gravity. The ReTrakt hydration hose features a magnetic design help you stay hydrated and focus on the trail ahead. The hydration pack's lightweight, ventilated materials ensure a comfortable ride and the 8L cargo storage allows you to bring with a jacket, tools, food, and other items. It also makes a great companion on day hikes or other outdoor activities.