These are fantastic hydropacks. I got one ea for my kids and was so in awe of them I ordered one for myself. I actually got the Raptor 14 which is about the same size but larger storage pockets. As with any bladder you'll need to devise your own method of holding the bladder open while drying. They're like mini backpacks with all the adjustments, which really help with proper fit and keeping things from jingling around while MTBing.