Celsius XXL -18C/0F

This is my third teton gear bag. It is warm, the zippers are real ykk zippers & are very smooth. This bag is thick, plush, warm, the flannel lining is soft. The ripstop nylon outer shell is heavy duty and water resistant. The velcro keeper at the top of the zipper securely keeps the bag zipped. No slip. The draft tubes around the top edge & the zipper do an excellent job. These bags are high quality & well made & a very good buy at this price point. One more protip/life hack: take some 550 paracord & make yourself some zipper pulls. It makes finding & using the zippers so much easier, especially in the dark or with mittens on. The stuff sack works well and is also water resistant. This bag is big. Really big! Lots of room and very comfortable and warm. This is perfect for car camping, paired with a good sleep mat/pad.

Awesome sleeping bag! I did about 5 hours of research before my final purchase and I am super happy.About these bags...there are Celsius and Fahrenheit models of the same bag. It looks like the only difference is that the F model interior is made of COTTON fleece and the C model is made of POLY fleece....so this bag is going to be the higher quality model.If you are 6' tall or more, you should get the XL or XXL model (90" long) because you lose a good 10" of length with the regular model. I am 5'5 and I appreciate the extra length because you can slip your body to the very bottom of the bag and pull the front over your head, completely isolating yourself from the outside world.My intention of getting the XXL bag was to happen upon a sexy other that may not have such cozy sleeping arrangements and stuff them oh-so-close beside me in my conveniently big enough sleeping bag. This bag is small enough to not look obvious to my plan, yet big enough where two smaller people could sleep on their sides, cuddled next to each other inside the bag. There is no way two people could sleep side by side on their backs.....33" wide is sadly, just not enough. It is good for extra elbow room, which I am taking full advantage of.Teton also sells the mammoth bags that are designed for two people, but if I took that on a trip with me, I would be looking pretty desperate, not to mention, they are huge to carry around.This baby is warm....I got the 0 degree model for my 40 degree campouts because these companies are all exaggerators. I was snugly warm, and not too hot at the same time.One altercation is that the bag does not zip at the bottom, making it near impossible to use as a flat blanket. It does, however have a seam at the bottom so I think I will rip this baby apart and sew on some velcro so I can open it up all the way.The sack that contains the sleeping bag is awesome. You can actually put the sleeping bag back inside after removing it and it comes with straps to shrink the size down a bit. It's also water-resistant, but I would spray it down with some repellant if I was planning on giving it a good soaking.What more can I say? Great price, will keep you warm and cozy, my guess is down to the 20's.

OVERALL IMPRESSIONWell-constructed bag - highly durable canvas outer shell and comfortable lining (that can be removed for washing). I tested this bag down to 0 on a winter camping trip - I actually had the bag 3/4 unzipped and I was still warm.It's a heavy bag - so, really only useful for car camping. I'm 6'0" / 235 lbs and I toss a lot when I sleep, so I was a little concerned whether 39" would be wide enough. So, I've only used it unzipped (in zero degree weather) and it was generally quite comfortable and warm (see below).SOME SPECIFICSShell - durable canvas, but everything is single-stitched and I'm wondering how that will hold up over the long term.Lining - very comfortable flannel cotton, with velcro tabs for easy removal.Zippers - medium size synthetic material that glides quite well. No sticking or grabbing the liner so far.Velcro Tabs (at top of zipper at head of bag) - thoughtfully added extra velcro on the tab, so that, if you're not using the tab to close off the bag at the end of the zipper, you can fold the tab back on itself so that it's not scratching you or the bag.COMFORT FACTORThis is a really thick bag (both bottom and top). So, sleeping on any kind of uneven platform, pebbles, twigs, etc. will not be a problem (I only used a 1/4" foam pad underneath) - feels like a moderately firm mattress.COMMENTS ON SIZEGenerally, adequate to more than adequate for someone 6'0" / 235. However:- the hood section (extended bottom piece used to place pillows, etc. is only about 12".- the inner usable volume (max space between the top and bottom is adequate for my size, but not overly spacious. I didn't feel claustrophobic, but I did leave the bag unzipped. Note that there is a trade-off on this design issue - the more space there is to toss and turn, the harder it will be to stay warm. So, if you're in my size range, I think this bag will be fine.TEMP RATINGI don't understand manufacturers' temp ratings. I tested this at just below zero with the zipper undone (in a good tent with no wind), so I would assume it's good to about 10 below (with the zipper up).On the flip side, I wouldn't use this bag for anything above 25-30 degrees - it would be a sauna.This is strictly a winter bag.CAVEATSBecause the outer shell is fairly stiff canvas and the width is 39" there is no real closure around your head, so there is some exposure to cold around your neck and shoulders. I thought this would be a real problem, but it certainly didn't affect my sleep - overall, I was very warm and comfortable - because it's a heavy bag, the cold didn't extend down to the rest of my body and it's still a 90" bag, so you can slide down and only your head is exposed.There is a drawstring around the head section, but it's not very useful (stiff canvas). So, don't count on that if you really need to close off the head section.The warranty is voided if this bag is machine washed (liner is removable for washing). I can't imagine washing this by hand. So, keep it clean.BOTTOM LINEA keeper for the winter.