Thule Vital 8L hydration backpack has a 2.5L Hydrapak reservoir and expandable cargo space designed to fit all the gear you need for a day out on the trails. 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 the pack thanks to convenient jersey-style pockets. Improve bike handling and reduce muscle strain with optimal weight distribution thanks to the low centre of gravity. Stay hydrated on short or long rides with a 2.5L Hydrapak reservoir. Adjust pack size to carry various loads with expandable panels and up to 8L of cargo space. Maximize uphill and downhill performance with the lightweight, ventilated materials. Protect a phone or sunglasses in the soft-lined, quick-access pocket. Secure keys or other small essentials in the interior zippered pocket. Stabilize and increase comfort on any terrain with a sternum strap. Secure a tire pump and shock pump on designated interior loops.