Mountain Hardwear UltraLamina 0°

The bag is warm, packable, and good quality. Someone who sleeps cold should do well in this bag.

This is the best sleeping bag I've used so far. Using it recently on the AT it kept me warm @ 20°F and got too hot when I zipped it up the second night @27°F in the tent. I have a feeling it will go down to 0°F, but it works well into the teens.

Have the regular size so there is extra room all over the bag for me to move around in. I probably should have a short, but the extra room allows me to store all kinds of water bottles and clothes in it, plus phone, GPS, etc.

The bag is easy to get into, and the zipper is super smooth. It does tend to catch the light material in the zipper a bit, but it just means you should be careful zipping it up. It zips from the outside or inside of the bag, great lightweight design.

The bag has very good moisture resistant property. It does get wet, but it dries well because of the light fabric. FYI I bought it for a cave expedition in a 37-40°F alpine cave for camp purposes. The trip was in and out of the water for 8 hours just to get to camp. Extended surveying and rigging took place on trips from this camp. Very difficult to keep things dry. The bag did its job better than the other bags on the expedition.

The bag really packs down well for synthetic. Love how it packs down. Plus, the bag seems to puff up well again even after the couple years I've had it.

It's pretty durable, as I remember it was washed in the cave stream after the expedition. Just don't be forcing the zipper through fabric snags and it will be fine. Also, store the bag hanging up so it can loft. Only leave it stuffed when you have to.