No, JP was already almost midway in the adjustment at age 9. His little brother could wear it at age 7 (we didn't try it earlier, but he could probably have worn it at 6). At age 7, JP was using an older model REI chldren's pack. At age 13, although JP hasn't started the teenage growth spurt yet, he has basically outgrown the Fox 30--it's at the largest adjustment and he wants to carry more than we can squeeze into the 30-liter pack (his fishing tackle is a problem). He can now carry all his gear and most of his food (thank goodness!) and that won't all fit in the 30 liter pack, either. Probably the Deuter Fox 40 youth pack will be next, until that growth spurt gets going (his father didn't start until 16, so we're not anticipating it soon). I'd prefer to get him a ULA Catalyst, equal comfort but much lighter, but the price differential is just too steep for a pack that will be outgrown in a few years.

It's going to be a toss-up as to which child goes to an adult pack first--JP or his 11-year old sister, who is already starting her growth spurt!