User Review: Sierra Designs Arrow Rock 30
Source: tried it in the store
This bag rocks! I refer to it as my cloud; I sleep in it more often than I sleep in my comforter, either in my tent or in my bed!
This is a fantastic summer bag that I've renamed my "cloud". It says that its lower comfort rating is -1°C, but I've only used it to about 4°C and I've been great. It's got enough stretch that you can move around a bit in it, and it compresses perfectly into the size small Sea to Summit eVent compression sack (that's 10L down to 3.3)! When I take it out, it lofts back up beautifully.
I'm 5'7", and the maximum height for the Regular bag is 6'0", so I obviously fit in it fine (though I would love to see more companies making bags in the 5'10" range). The hood is great and you can cinch it up if you get cold; there is no neck baffle, which some people may find off-putting, but I have never needed one in the summer. It also has some handy little straps to connect to your sleeping pad, which can be quite beneficial if you like to thrash around in your sleep like me. The double zip is also an important feature that I find most reviews overlook; I like my feet to breathe when I sleep, and this bag definitely accommodates. I've only had trouble with the zipper once or twice, but it seemed to resolve itself.
I'm going on my fourth summer with this bag, and my only complaint is that it's starting to lose some down, though I think that this is pretty common if you are compressing and using this bag as often as I am (last year I lived in my tent for 8/12 months, and was frequently changing camp). Even now that I am back in school, I use this on my bed more often then I sleep in my actual comforter.
Overall, I would definitely recommend this to a friend.