The North Face Beeline +30°

I do have some minor complaints about the bag, not the least which is the lack of a zipper. I'm not altogether sure whether what's saved in the overall decrease in weight isn't sacrificed in ease of use. Sure, shimmying in and out of the bag isn't the most difficult maneuver in the world (it's not a wetsuit), but it does make late night calls of nature slightly less than desirable.  Another problem with the lack of a zipper is that it can get tough to regulate temperature when it gets a little too warm.  The zipper in the footbox helps somewhat, but it isn't a complete fix, especially during the summer.  Another nice feature would have been a small gear pocket -- these can be handy for keeping track of small items such as glasses or your headlamp.  Last but not least... the catch .22 of the ultralight bag:  because of the high expansion rate of the down, anytime the down gets compressed (such as when the bag touches the side of the tent) you get a cold spot. Best advice for avoiding this is to try to ensure you have sufficient room to sleep without compressing the insulation but otherwise this could be an issue in this (or any ultralight) bag. TNF has paid particular attention to the weight of the bag (even the logos are heat-applied as opposed to stitched to save on weight) but it leaves me wondering whether they may have gone a bit too far.  All things considered, it's not perfect, but this may be as close as it gets for three-season backpacking.  The North Face really sets the standard in ultralight sleeping bags with the Beeline +30. [UPDATE - Feb 2008] My research shows that The North Face has made some changes for the 2008 model.  Alas, a zipper.  It also appears they have moved away from 900 fill in favor of 850.  In addition, it appears they have added my coveted internal gear pocket. These changes have increased the weight by 3oz. (to 1lb. 6oz.)  I have contacted TNF about these items (the website has some inconsistencies) and will keep you posted.