I agree with getting a cheap one from Walmart. We have their brand of sleeping bags, Ozark Trail is their brand name and they have a few varieties on their website. We’ve been using them for a few years and no problems with durability. My 11 year old is still using the youth one but she’s short.

LLbean and REI have some good inexpensive ones. But I would also look at Walmart - brands like Coleman. Don't go too big if you are using it for more than camp - you lose heat in the cooler months if the bag is too big. and don't go too big if he has to carry it. I would also take sheets to camp if there are cots/beds as that is way more comfortable.

Just get an adult sized bag. He'll be adult sized soon. I always recommend a 30 degree bag, as it will generally work for three seasons.

Look at LL bean, the adult sized bags. Get one that unzips completely (rather than cocoon style) so it can be used more as a duvet.

I'd just buy a cheap one at Walmart. It's summer (so doesn't need to be super warm) and the likelyhood of it getting lost/ruined/dirty is next to 100% LOL

Can someone recommend a 11 year old sleeping bag for sleepaway camp? He will use it for overnight camping outdoor & sleeping in a cabin. Thank you.