The Mystery Ranch Scree Daypack is a multiuse backpack for hiking, climbing, travel, you get the idea. At 32 liters of volume, it's not too big, nor too small for packing full of your necessities. Compatible with a hydration reservoir so you won't get thirsty plus side water bottle pockets if you prefer to carry your water that way. Or do both, it doesn't matter. The 3-ZIP opening allows access to all items, so you can grab what is needed then close it back up in a jiffy. Head out for a day hike or squeeze in just enough stuff to pull an overnight.