Like I said, I pretty much agree with everything written so far <grin>. I use what is suitable in my collection of gear and most short trips (like this past weekend) I use an internal frame. But... in my present collection of gear I don't have an internal that is suitable for anything more than a weekend trip with a winter sleeping bag unless I use my down sleeping bag (presently hors d' combat and not high on my list of "things to fix"). Again, make sure the sleeping bag will fit where you want it to go (there is a "prefered" location on any pack) - that's the main point I wanted to make w.r.t. the types, because simple volume comparisons don't tell the whole story.<br><br>Regards,<br><br>Tom