Marmot Trestles 15 Sleeping Bag: 15 Degree Spirafil

The bag was warm but I want a lighter and more compact bag for lightweight backpacking.

I bought this bag before a two week trip to Idaho. Although it never got terribly cold the bag kept me nice and toasty the whole time. On the warmer nights that we had, the dual zippers offered up nice ventilation to keep me cool. The bag is quite lofty and with just a thin foam thermarest I slept comfortably for the entire two weeks. Further, the little stash pocket is handy for putting any extra things you can't fit into the pouches of your tent. Overall, I'm very pleased with this purchase.

I bought this with the intent of not having to need a pad and it worked great. First night I slept inside of the bag and the second I slept on top of it. Worked great. The dual zippers give you enough breathing room when its warm outside. Didn't get any condensation from sweat. The bag packs pretty well but is a bit of a pain to get it back into the included sack in a tent.

It's a well made bag: good design, good materials, good workmanship. I'm 5'11" and 165 lbs and the regular bag just fits - if you're any bigger, get the larger bag. For a synthetic bag, it packs small enough - if you need smaller, then buy down. The zip is 3/4 length, I would have preferred full length. I haven't field tested it in cold conditions, but it does look like it will keep you warm at below freezing temps. All up, you'd be hard pressed to find a better synthetic bag at a cheaper price. Ordering and delivery was fast, professional and painless.

It's a well constructed bag with good quality materials and workmanship. For a synthetic bag, it packs well enough to backpack with. I haven't given it a good test in cold weather yet, but it looks like it will keep you warm to below freezing. I like the 1/4 length offside zipper - good idea to help cope with warm weather use. I'm 5'11" - average height and average build (165 lb) and the regular bag just fits - go for a bigger bag if you're any taller or wider. My only criticism is I'd rather it had a full length zipper that went all the way around the feet, instead of the 3/4 length with box foot. All up, I think you'd be hard to find a better synthetic bag at a lower price.