The H2O Hydration Pack is the closest thing you'll get to having cold water on tap while you're traveling! Great for a hike or heading to the campground, or any event where you will be doing a lot of walking and might get thirsty... You'll never go thirsty thanks to the 1.5 liter reservoir inside. Once you've filled the 1.5 liter reservoir with the cold drink of your choice (preferably water), you can drink from the hydration tube and bite valve whenever you'd like. That sure beats the heck out of fumbling around for your personalized (and probably heavy too) water bottle when you need some refreshment! The H2O Hydration Pack is comfy too, with padding in all the right places to fit snuggle on your back and take with you. It's designed with a padded airflow mesh back and adjustable straps, complete with a sternum belt. The shock cord and the reflective piping on the front and back boost the safety even further. This has been worn, and used so there is some signs of wear, and the hydration bag is a bit aged so may need cleaning or can be replaced if needed. Pricing this accordingly to represent the hydration bags age and that you might want to replace it. The overall condition of backpack bag is good and all zippers work and it will hold quite a but of gear along with a filled hydration bag of liquid.