I have a 40 Degree Farenheit Bag, What will my new rating be if I add this?
1648970
Although I have this bag, I use mine as a lightweight spring/summer/fall bag. That said my guess is that you should get at least 20/25 degrees.
943178
My brother's zero degree bag fit in a medium sack but it did take quite a bit of effort to stuff it in. Therefore I would think large just to make things easier on yourself.
1562381
Yes. You need to know that this bag is quite insufficient for warmth in temps below 60
515574
THIS bag will work for you! I got it for my son to go on a trip where the temp got down to 20 at night and they were in cabins, he was very comfortable.
1345916
My first use of this bag was on a night that dipped to 40 degrees. If I completely covered myself (hood up and tight) I was actually a little too warm. My feet were chilly all night though regardless - wish I had worm wool socks that night.
638050
I've never had this bag at -30 degrees, but I've had it at near 0 degrees. It is a comfortable bag, warm but do not layer up on your clothing. Because this bag is made to reflect body heat back inward. I am 5'8" and find this bag to be a little too roomy with too much air space inside. But you can pull the bag into you to eliminate the air space. All in all it is a good bag, but is made more for a person of 6' + the company would do well to make various sizes bags for various size people.
1345913
I bought this bag because I didn't want to roast in my winter bag while sleeping inside a cruising sailboat in Florida. I also wanted a small, lightweight bag. When it's 40 to 50 degrees outside, with no heat on in the boat, I'm extremely warm and comfortable. However, I wouldn't push the limits of this bag (or any other bag), especially if you're going to be uncovered or regularly in 45 degree weather. You should purchase a bag that exceeds that limit, more like a 30-degree bag.
1120294
It says 20 degrees. I used it in 40 degree temp with just my boxers on and was perfectly warm. Temperature really is relative though... In cold nights a person should always do some "warm up" activities to warm your body temp up. Sleeping bags are designed to keep in heat, if you go to bed cold you will stay cold. Also if one person is in the bag you may loose heat. Normally I am in it alone.
1357385
Don't thank it goes that cold bud ! You could build a box for it and insulate the box I think it goes to 10 degrees ! I'll check when I get home and let you know for sure !!
71559
Maybe the quality in production has gone down. Over the years the quality of mine is still like new(taken good care of it), almost bought another one recently. I love my bag. The price and temp. rating, but I've also read mixed reviews. Don't forget a sleeping pad! It will make a huge difference in your comfort and keep you warmer. I think many of the bad reviews may have forgotten this and blame the bag. You loose body heat to the cold ground. I hope this helps!!
1812366
Look at your tire and it will state what the PSI cold should be. That is the rating you should use.
81686
Yes ot will. I just came back from a ski vacation and it was -10 c and it was ok
1119520
This is a big bag, by any standard. I just did an overnighter in 24 degrees Fahrenheit. My feet were really cold until I put my down vest where my feet were (something I could never do in a normal sized bag). From that moment on I was toasty warm! Woke up with frost all over my bag, but I was cozy, almost too hot. So yea, you'll be fine, just put tomorrow's clothes or your jacket down around your feet for a great night's sleep. I like how I can zip up and still have plenty of room to move without getting all wrapped up and twisted, something new for me. BTW, I'm 6'3" and 300 "weight lifter" pounds. I love this bag! This is a big bag, by any standard. I just did an overnighter in 24 degrees Fahrenheit. My feet were really cold until I put my down vest where my feet were (something I could never do in a normal sized bag). From that moment on I was toasty warm! Woke up with frost all over my bag, but I was cozy, almost too hot. So yea, you'll be fine, just put tomorrow's clothes or your jacket down around your feet for a great night's sleep. I like how I can zip up and still have plenty of room to move without getting all wrapped up and twisted, something new for me. BTW, I'm 6'3" and 300... » Read More This is a big bag, by any standard. I just did an overnighter in 24 degrees Fahrenheit. My feet were really cold until I put my down vest where my feet were (something I could never do in a normal sized bag). From that moment on I was toasty warm! Woke up with frost all over my bag, but I was cozy, almost too hot. So yea, you'll be fine, just put tomorrow's clothes or your jacket down around your feet for a great night's sleep. I like how I can zip up and still have plenty of room to move without getting all wrapped up and twisted, something new for me. BTW, I'm 6'3" and 300 "weight lifter" pounds. I love this bag! « Show Less
665932
You are right there in the betweeners! if you are over 21, and will not grow anymore, medium. Plus, the sleeping bag is not for 40 degree nite frigid cold temp. I was wearing Hot Chili thermal full set with the bag and I was still cold. Other note, the bag is very ackward to be in. Just think of you being a cat with for paws covered with mittens.
700903
Sorry don't know. I live in Arizona so cold weather rating not important to me
2061025
It seems as though your numbers are lower than what I see. James comment about your altitude is important, but so is what you are trying to bag. If you are trying to bag some food that is hot (or even warm), it can reach "boiling" before you get to the level of vacuum you desire. Ideally any food being bagged should be cold to prevent this from happening.
1448676
Very doubtful. The bag seems to be made of the same material as a Zip-Loc bag and I'm reasonably certain it would melt if heat were applied to it.