The Gregory Women's Maya 10 Backpack doesn't just hang off your back like a sack of potatoes. The Maya's BioSync suspension system allows the pack to move with your body in motion and keeps the pack centered on your back. The pack's hydration tube management system keeps the drinking tube within easy reach, so you don't have to divert your attention to take a drink. The dual waist belt pockets and side pockets make it easy to access the things that you need to get to in a hurry, like your camera or a snack. The Gregory Maya 10 fits a two liter hydration reservoir, which is enough for a day hike or a few hours on your bike.