Fill up the included 2. 5-liter Hydraulics reservoir grab a windbreaker and some snacks and take your enduro bike out for a rip with the Osprey Syncro 3 Hydration Backpack. This pack has just enough room for the essentials and is fitted with a front tool organizer (not that anything on your bike would ever break). A LidLock helmet attachment comes in handy when you're out of the saddle and the integrated rain cover is especially convenient when that light wisp of clouds over yonder quickly turns into a menacing thunderstorm.