Description of ALPS Mountaineering Slick Rock Sleeping Bag: 20 Degree Primaloft:
The Alps Mountaineering Slick Rock Sleeping Bag is a warm, light, breathable bag for three seasons of comfortable camping and backpacking. Primaloft insulation offers down-like warmth and weight, and it won't soak up as much water as other synthetic insulations, so don't worry too much about testing its ability to insulate when wet (which it does). The Slick Rock's contoured hood and insulated full-length draft tube trap heat during chilly spring nights. This mummy bag packs small and resists abrasion.
Bottom Line: Enjoy a warm night's sleep and more room in your pack.
This bag is very compact and small in its stuff sack, but I would not rate it at 20F. I have another 20F bag by Lafuma that keeps you nice and warm, but in this Alps Slick Rock bag my feet and legs got slightly cold in 40F conditions. I'll probably return it and either order the 0F Alps bag instead or find another 20F bag from a different manufacturer. Otherwise, the construction and materials quality seems good.
I bought this as a way to lighten my load on overnight backpack trips with my scouts during the late spring, summer and early fall. I have used it from the Uinta Mountains of Utah to the slickrock canyons of the Dirty Devil. It's very compact and compresses smaller than the included stuff sack. It is reasonably light weight (especially for the $40 I paid on SAP), but it is nowhere near a 20 degree bag! I sleep warm to begin with and I had some chills on a 35 degree night. The temp rating is more of a survival rating...add 10 to 15 degrees for a comfort rating. I will be keeping it, though, for an all around light weight bag I don't mind trashing a bit on trips.
Seems to work well into the mid-upper 20's. Compresses smaller than advertised. I can easily get it to about 8x12 in the stuff sack it came with. This will be great for 3 season backpacking.
