eh, i've had better.
A 15 degree bag lacking a draft collar, depressing indeed, every time I move air rushes into the bag bringing the the cold breeze of regret. Despite the short zipper' neat anti-snag lining it fails to keep the warm in and when shifting I would wake up suddenly cold where my arm had lifted the tiny draft sleeve.
While I was disappointed overall there were some decent features, It is light, and very compressible, and the snag free zipper liner is nice(never once caught the fabric), but overall the bag was a strike against sierra designs. I'm going back to montbell, they've never let me down, and fire-engine-red-orange is so much brighter than blah-yellow-orange..