The expertly designed hydration pack Constructed specifically to improve bike handling and reduce muscle strain, the hydration pack has a low center of gravity for optimal weight distribution. Another unique feature is the Thule ReTrakt hydration hose, the magnetic design allows the hose to automatically snap back in place in between sips. This means you can stay hydrated, but still save time and focus on the trail ahead. The hydration pack&';s lightweight, ventilated materials ensures 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. Stay hydrated without slowing down using the hands-free ReTrakt magnetic hose return system Quickly access nutrition, clothing or tools while riding without having to stop or remove pack thanks to convenient jersey-style pockets Improve bike handling and reduce muscle strain with optimal weight distribution thanks to the low center of gravity Stay hydrated on short or long rides with 2.5L Hydrapak reservoir Adjust pack size to carry various loads with expandable panel and up to 8L of cargo space Maximize uphill and downhill performance with lightweight, ventilated materials Protect a phone or sunglasses in the soft-lined, quick-access pocket