Mountain Hardwear - Lamina 0

For posterity, the sizing is indeed important.  The non goretex versions are "performance mummy cut" which mean these are smaller.  The goretex ones are the ones you bring for expeditions, these are the big bullet proof tankers known as "Expedition mummy cut".   Inside the Expedition Cut, you can gear up with your belay down jacket and stuff, theres more room and then you can get a -18c instead of a -40c for example. The beefier goretex expedition one is interesting if you sleep straight outside in winter, with no tent.  It stop wind and melting snow wont wet the sleeping bag.   For serious winter stuff you can add a VBL in that melting pot of kit to manage humidity and dew point but its not in the main subject. Things to remember: - Performance cut; - Expedition cut. I personally have the blue and red MHW -40c goretex, the -18c, the -18c goretex and the -9c. Each sleeping bag have its particular usage in my activities.

I have 2 MH bags, they're great in theory and I love the design of the junior bag in particular (the adjustable length is fantastic) and they're manufactured to a good quality, but the temperature ratings are way off. I have 0°C bags but I consider them 2 season *at best*. That said, they're so roomy and do feel comfortable so I like using them in summer. I would recommend them with the caveat of adding an extra 15°C or more onto the comfort rating. I don't know that the weight to warmth ratio works out particularly well at that point but it's nice having a wide bag. With that in mind though, if I'm advising to compensate the temp rating for a nice bag I'd suggest EE or FF, which are much lighter for the weight to get the same real work temp and is a quilt so inherently more roomy. I think as someone else states, MH are a decent brand but they just don't do any feature (besides the adjustable length which might actually be discontinued now anyway) better than anyone else

I use a Mountain Hardwear Lamina Spark bag for this weather when sleeping without a tent. These are relatively light and not too expensive.

My 11 year old 15 degree Mountain Hardware Synthetic mummy is as reliable as it gets, I've used it down to 22 degrees with a windchill in the teens and was comfortable. I trust it with my life. It's not even that heavy, right at 3lbs... only problem is that it's bulky. 12L stuff sack. I went with down for my hammock quilts, but if I have to sleep on the ground and worry about water intrusion or tent condensation, I'm using the MHW.

It's really a personal choice. I would suggest you try the MH sleeping bag. It's a free way to test a type of sleeping bag. Worst case, you buy another one later. I personally use down sleeping bags because they are lighter and compress better. But they are more expensive and take a lot longer to dry if it gets wet.