Rating: 4 / 5
At 13.5 OZ this versatile bag works great as a 3 season option when coupled with some other inulating layers that i already have in my pack or works great alone on those hot summer nights. it is rated to 50 degrees but I have successfully used it on nights in the low 40s and have been warm (inside a bivy with my MB Extremly light down jacket)
My favorite feature is that it unzips all the way which turns it from a "conventional sleeping bag" to a quilt style sheet. When zipped up it stays close to the body to keep the warmth on you.
I have used this bag on many overnighters and have not been dissapointed with its performance. It packs down small and it is certainly lightweight.
My only complaint is that I wish there was some more wiggle room at the feet in it when its zipped up.