What Our Gearhead Experts Are Saying:"This is my go-to for all-mountain rides. The lumbar reservoir is a game changer—keeps the weight low and stable, which makes a big difference on long climbs and rough descents. Plenty of space for tools, a jacket, and snacks without feeling bulky."From dawn patrol trail rides to full-day epics in the alpine, we count on the Dakine Syncline 12L Hydration Backpack to keep us fueled, organized, and moving freely. With 12 liters of storage and a cleverly placed lumbar reservoir, this mid-volume pack delivers balanced weight distribution and easy access to hydration—even when we’re deep in the zone. The updated design features a rugged, recycled ripstop polyester exterior and Dakine’s proven Air Flow backpanel and shoulder straps to keep air moving and comfort high. It houses a 3L Hydrapak reservoir with magnetic hose clip, a fleece-lined pocket for sunglasses, deployable straps for body armor, and space for tools, layers, or trail snacks. Ready for bike park laps or backcountry loops, it even includes a built-in rescue whistle and spine protector compatibility to back us up when we push the edge.