Andywrote a review of Platypus GravityWorks 4.0L Filter System on August 29, 2015
My first attempt at a real backwoods hiking trip was with this backpack. Dropped more than I should have at some other retail outlet(my bad). Anyhow, I was thoroughly impressed with the pack. I was able to attach a 4 person Coleman sundome directly to the bottom of the pack(without the poles), attach my air pad to that with a couple carabiners, my sleeping bag and clothes inside with food, firstaid, mess kit and hygiene stuff. Even with all that I was able to slide in a 2 liter water bladder on the outside. It weighed over spec in sure. Hauled it in 3 hours to a camp site and felt great. Not bad for a beginner.