I got this for my husband who is 6'6" and for my 10 year old son. It fits them both great. We ride bikes and hike and needed the bigger bladder for our son then you can get in the child's packs. It's a little heavy at first but after he drinks a bit he's fine. All the pockets and room for the bike helmet make this a great pack. I love the big opening for easy filling and cleaning. Back Country had the lowest prices I could fine on the internet and their free shipping got here within a couple days. Excellent service and a great pack. I now come straight to Back Country first when I'm searching for gear for the entire family.