The day star is camelbak grab and go pack with enough features for a quick out and back it also does double duty in the front country remove the reservoir and it is got room for books lunch and a layer put it back in and yoursquove got enough water for 2 hours on the trails if yoursquore loading up for a longer hike there are side pockets for extra water bottles attachment points for trekking poles and a removable waist belt for more stability on the trail when yoursquore traveling light j