Spark Pro Down Sleeping Bag -9C

I got sea to summit spark pro -9, its rated for -3 comfort. 860g for long. I think a non pro regular version is 730g. and its very wide, I'm able to fold my legs inside it and turn around easily. and I'm 186cm. Was cozy in it undressed at +0 outside (was +4 in tent) , and I'm a skinny cold sleeper.

Thats why I went for the pro which opens as a blanket. Expensive, but probably the only sub 900g wide sleeping bag rated for negative comfort

Yes, I used to use the Sea to Summit Spark Pro, but I found it didn’t work well for me since I’m a side sleeper — I’d often end up sliding off the pad. Quilts can be secured to the pad, which makes a big difference for someone like me. Also, I’m a 5'5" female, and most regular sleeping bags are way too long. Custom-made quilts are a much better fit.

I’m 6ft 187lbs. I’ve got room in it but I’d have more if I got the longer version. I just didn’t wanna carry the extra weight. I like the fact that the bag can almost turn into a quilt and has lots of spots for heat to escape. Edit: as in zippers if you get too hot. I sleep extremely hot so it’s nice to open the bag up on top and use it like a quilt almost

My spark pro from sea to summit you can unzip and stick your arms and feet out lol :) kind of gimmicky but I can see it being nice on cold nights It also weighs quite a bit less than the Coleman 15 degrees bag I bought before. The Coleman had higher D rating material and allowed you to strap the bag to the pad which I think is neat tho

I’ve always used mummy bags and they work great for me but it’s a matter of preference. Obviously you can’t “starfish “. I would call S2S, ask if you could buy it, try it on in your home and return if it just doesn’t work. You might also look at the Pro version, slightly more bulk and weight but a little roomier and more versatile. The folks there seem to be very knowledgeable and willing to help.

Take a real hard look at the Sea to Summit Sparc rated to 30f, also comes in a 45 and 15. Beautiful bag, stuffs to the size of a 1ltr water bottle. Fabric and down technology is,in my humble opinion, unmatched. I’ve been in the industry for many decades, owned and tested more bags than I can name. S2S bags are a well kept secret.

Sea to Summit Sparc. 30f bag that compresses to the size of a water bottle.

I have a couple of those bags, I've been in the industry for decades and S2S makes some of the nicest, tech-forward bags I've ever seen or used. Great little company, superb product and support.

Sea To Summit makes, in my opinion, the best warmth to weight/ bulk equipment on the planet. It’s not budget, but it’s not the most expensive line out there and they do occasionally have sales. Take a hard look at the Sparc line of sleeping bags.

Spent 3 nights in Cairngorms this winter(yeah slept in a snow), I used Sea to Summit Spark -9c and their sleeping mat Xtreme R value 6 or something and was fine(ambient temperature was around -5c but wind and snow made it much colder). 1 night I slept with my down jacket + down trousers and down boots. Main issue is moisture in the air, I would recommend synthetic bag just to keep you warm if are planning to spend couple of nights. For overnight down sleeping bag is perfectly fine.

The BA Copper Spur HV2 Expedition (not UL) is meant to manage strong winds and snow accumulation, on the other hand, the HV UL version is not. Also, the HV UL has a fairly thin floor fabric and given the use that you’re planning for it, I wouldn’t trust it, especially on ice and rocks. A -9 sleeping bag should be enough for 3-s alpine use. I am a warm sleeper and I have used my -11 bag on early autumn nights on the Alps (2000m) right below freezing temperatures and it was fine, but I wouldn’t push it too much. I guess you could use it but you gotta accept that you’ll have to layer on some clothes in certain situations. Not exactly UL, but I’ve used the Naturehike 5.8R pad and that worked extremely well for me in the same situation I described above. I could feel the heat of my body being reflected back to me. The vast majority on this sub seem to be using UL pads, despite the durability issues that come with them. There’s the RAB Ultrasphere, Thermarest Neoair XLite, Nemo Tensor Allseason UL, Sea To Summit Ether Light XR. Personally, if I were to but a new one I would try the Big Agnes Rapide SL, mind you it’s not UL.