Review on RUPUMPACK 18L Insulated Hydration Backpack with 2.5L BPA Free Bladder - Lightweight Water Daypack for Hiking, Running, Cycling, Camping - Commuter Fit for Men, Women, Kids by Jeremy Choi

Overall, the backpack looks good, but there are a few flaws.1. Firstly the whistle is a gimmick, I was expecting a proper whistle that attaches to the backpack, you actually get a small hole drilled in the side of one of the backpack clips. In most cases this does not work. If you are serious about safety and alerting someone in an emergency, do not rely on this whistle, buy a suitable whistle instead.2. From the photos it looks like you can easily slip your phone into the side pockets at the waist for quick access. The reality is that the compartments are too far back and you have to stretch and twist to open and close that compartment. It is very inconvenient to put anything in these compartments when carrying a backpack. If you're looking for a branch that's convenient for you to access while on the go, then this isn't for you. It became easier for me to put small items in my own pockets.3. A hydration pack leaves little room for anything else. I need something to pack snacks and other small items, but there is very little space for that.4. The straps are too long and you have a lot of straps during the hike that I couldn't hide. What do I like in a backpack? 1. The hydrator works and I drank water from the snorkel along the way with no issues. 2. The backpack has chest and waist straps, so it fits snugly and snugly on the body, won't swing or slip off your shoulder during the hike.3. Although smaller than I expected, the compact size makes it a breeze to carry around. So overall this is a decent backpack for the money but if given a second chance I would buy something else. I give him 3 stars.