The Deuter Speed Lite 20 Pack is the largest pack in the fast-moving adventure series. Grab the 20 when you need loads of space to carry a few layers, lunch and plenty of water. The main compartment is compatible with a 3L hydration reservoir (not included), but you can also jam water bottles in the mesh side pockets. Pile in the first aid kit and whatever else you'll need during the race, day hike, or mountain bike exploration. Small but sweet, keeping things lightweight with a Delrin U-Frame.