It is an inside string - I can't remember if it is elastic or not. I think I would like a baffle too (insulated tube.) Now that I think about it though, as an outer bag the string is better than a baffle. (I put my 40 degree 0 degree bag (my rating vs. their worst case rating) in this bag.)

Way off topic, in another thread a BCF hike was mentioned. It would be very, very cool (pun intended) to have a winter version. Anyone game? With enough notice, I could possibly make it (I'd have to talk the hubby into it, but since Wandering_Daisy wasn't a serial or any kind of killer for that matter, he'd prob. be more confortable this time.)

Thoughts?