Fell in love with this hydration backpack because of the butterfly mouth piece and colors! I bought this for EDC LV and it was the perfect size not too bulky or big and fit enough water so that I wouldn't have to be refilling every 30 minutes, however after filling bladder there isn't much room in the back pocket so I was only really able to put wallet, charger, keys (small stuff). The reason I give it 4 stars instead of 5 is because it only lasted me two wears (EDC LV and Paradiso) before the side zipper broke off. I noticed day one of Diso the zipper kept getting stuck and by day two it broke off completely. Kind of disappointing because of the amount of money spent I expected it to be better quality and hold up longer. Sister and I both purchased ours at the same time (she got the clear holographic one) and hers is still fine.