User Review: Marmot Men's Trestles 15
Temperature Rating: 15F
Price Paid: $85
This bag is great in temperatures around 30F. My fiancee and I (she has the women's Trestle 15) tried it in the high 20s this past weekend and had pretty chilly feet by morning. We are going to give one more try in the colder temps and see if making some changes to our sleeping configurations might make the difference. If it doesn't work, I'm going to see if I can't return them or sell them and get some warmer bags.
We do like the mateable feature for warmer temps (around 40F) but won't dare do it below 35F. They also stuff down pretty small for synthetic bags and just barely fit in our sleeping bag compartments on our backpacks but they're pretty roomy bags. The pocket inside is pretty big and will hold a lot but the velcro closure on it is small and stuff can slide past it and fall out (like a phone or ultra compact camera).
In the end it all depends on if you sleep warm or cold. If you need more warmth, try down. That's where we'll go next.