Thanks for all the info! I just kind of threw the $100 figure out there as I had seen some Marmot and North Face bags at my local sporting goods store that were around $89-$100. I guess if I get him an adult bag he should have it a long time I can spend a little more on it. Is the concensus then that I should get a down bag or are the synthetics o.k. I think I would rather have it light and compact and spend a little more!