I love this pack. I have used it for every day hike I have gone on since it arrived!! With a 3L bladder and wicked bite valve (awesome if you use it properly) that is held in place by a magnet (awesome), I have since given away my two other day packs. The outer pocket is stretchy which is very versatile. I use the helmet elastic part to secure my extra layer of clothing (easily accessible). Very comfortable, lots of storage, and holds more than you'd think - I typically fit 3L water + first aid kit + lunch + snacks + jacket + extra layer + spare socks + gloves + hat + insect repellant + bear spray + sunscreen + emergency SPOT device. Sweet!! Perfect for me. Oh - and the sides can be synched down if you have spare room. If concerned about space, go up a size and synch it!