You decide on what you want to carry with the included adaptors

Available in two sizes to accommodate a wide range of accessories

Using a highly grippy rubber strap

Tested to IPX7 water and dust proofing standard so whatever race day brings

off-line navigation and can be easily customized

Osprey Hydraulics Lumbar Reservoir - 2021 - 1.5L Lumbar PDP|Colour You decide on what youOspreys Hydraulics LT 1. 5L Lumbar Reservoir by Hydrapak is made for those who prefer an off the shoulder hydration solution. Designed to fit in most lumbar packs, but perfectly pairs as an extra or replacement reservoir for Osprey's Seral lumbar mountain biking pack. Twin welded chevron baffles stabilize the water and maintain a flat profile. Thoughtful design makes filling, cleaning, andmost importantlystaying hydrated on the trail easier than ever.