Sea to Summit - Spark Ultralight Sleeping Bag

I camped for a week in western & northern Iceland using 7C bag, down jacket & tarp. Not a problem!!

You could go with a lighter in weight zero degree bag. I use the Sea to Summit Spark zero degree bag, weight is 2lb 7.3oz. So I guess that would save at least a few ounces. But my point is that you could surely find a good zero degree bag that weighs less. Or you could use a sleeping bag liner to give you some extra warmth. https://seatosummit.com/products/reactor-extreme-sleeping-bag-liner?variant=42588765683885

\> Sea to summit spark 15 (EN rated -1.6°C). On sale now. Won't it be too tight? I have tried both a regular Spark 15 in the store, and a Spark Pro 15 (both in Long versions, as I'm 194 cm tall), and they are surprisingly roomy. I am a big guy at 116 kg, and I can roll onto my side inside the bag and throw my legs around. For comparison, I have tried getting into a Nordisk Passion Five XL bag too, and it wouldn't even close around my shoulders. I went with the Spark Pro 15 for the better down (so an extra degree of warmth) and additional features, but could as well been happy with the regular one. Already tested the bag out camping, and those features came in handy from flexibility standpoint - it was toasty with only 12C outside, so I opened it into a quilt and was very comfy all night. I'll be going to the Carpathians next week to sleep at 1500-1700 masl elevations and I think 3-7C degree temps, so I can share my experience afterwards, if you'll still be interested by then.

Really no way of knowing if it will fit. For me at 194 cm tall, the 198 cm Long versions of Sparks fit just enough to fit a "regular" sized aeros pillow inside the hood. If you put your pillow outside, you're probably gonna be alright with a regular length.

I have the spark, comfort -1 and -9 women’s specific, I love it, it’s tiny and lightweight silky soft and as a cold sleeper it lives up to its -1 rating.  Biggest worry is that the toe box and head are water resistant but the main body of the bag isn’t, though I’ve not had any wet feathers from condensation, the main body does bead, if you get a lot of  it in your tent I’d worry about it. I generally air my tent for a while whilst getting breakfast and coffee etc.. and dry it off with a micro towel, but if you are a quick starter in the morning I can see stuffing the bag into its sack wet being a problem.  Also you can see the feathers through the yellow sections of the bag, which some people may find grim.  The zip on it is great, and I would definitely recommend.  Owned the -9 for 6months and the -1 for two so not a long term review 

I have the spark, comfort -1 and -9 women’s specific, I love it, it’s tiny and lightweight silky soft and as a cold sleeper it lives up to its -1 rating.  Biggest worry is that the toe box and head are water resistant but the main body of the bag isn’t, though I’ve not had any wet feathers from condensation, the main body does bead, if you get a lot of  it in your tent I’d worry about it. I generally air my tent for a while whilst getting breakfast and coffee etc.. and dry it off with a micro towel, but if you are a quick starter in the morning I can see stuffing the bag into its sack wet being a problem.  Also you can see the feathers through the yellow sections of the bag, which some people may find grim.  The zip on it is great, and I would definitely recommend.  Owned the -9 for 6months and the -1 for two so not a long term review 

I’ve had my Sea to Summit Spark II for a decade now and it has served me well. I also run cold and hate cold camping (anything under 35F, I’ve camped in 19F in the past and nah, I’m good). It is definitely ultralight with an exceptionally small pack size! In tandem with a silk liner, my “camping” puffy jacket that’s not so puffy because it’s lost half its feathers and therefore packs down smaller, thick wool socks that are *only* for camp, and some thick cashmere joggers and I’m good to go for 30-40F. 99% of my camping is by way of bicycle, so pack size is the ultimate make or break attribute to my gear selection.

Sea to Summit Spark, or therm a rest Hyperion. Both just a bit bigger then a nalgene bottle when it is packed down

Sea to Summit Spark will tick all those boxes.

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 bags are excellent. Western Mountaineering makes bags that are a little higher quality than S2S, and more expensive. Feathered Friends is another excellent bag. Both of these brands are small American companies who focus on making the best products they can, price be damned. If you’re at all concerned with price the Sea to Summit Spark will work just fine. If the price doesn’t bother you, Western Mountaineering or Feathered Friends bags will keep you warm and happy for decades.

Sea to summit spark or katabatic and buy their hood. I’ve tried both and prefer katabatic (quilt)