User Review: Marmot Men's Helium
Fill: 850 down
Temperature Rating: 15 F.
Weight: 2.0 lbs.
Price Paid: $360
Just got back from a trip in the Black River wilderness in central Wisconsin, after sleeping a couple of nights in 2-foot snow drifts. The bag was awesome; any condensation on the bag the morning after was easily wiped up, with no noticeable decrease in loft after 2 consecutive nights in the high teens, wearing a thin fleece base layer and a hat to sleep. I slept with my wet clothes to dry them, and indeed, much of my gear came out dry the following morning.
I found the bag extremely comfortable, highly water resistant, very breathable, and ultra-packable. I've got mine in a small size Sea-to-Summit E-vent compression dry sack, and it comes in at around 11x7, or even smaller, if you'd like to squeeze it that much.
Bottom line: super-plush, 6+" loft, face guard seals perfect, cut is spot on...great balance between efficiency and elbow-room, and, most importantly, keeps you warm PAST its rating (conservative at 15). I have the model with 850 fill and pertex quantum shell fabric.