I purchased this exact sleeping bag from another store a little over 10 years ago. I dont camp weekly or anything but this thing has stood the test of time even being loaned out to kids who mostly played in it rather than slept in it while camping. I still have the old but it has finally come time to replace it and I will be doing so with this exact same bag. I'm 6'3" and I can fit completely inside this thing which is great. It also keeps me comfortably warm to 40 just as it says. Ive used it under 40 degrees with nothing more than sweat pants and a hooded sweat shirt and was just fine. Its also big enough to use unzipped as a nice comforter on an air mattress when you don't need to be zipped up and cozy. I'm still trying to find out if you can zip two together like one giant bag. Great product!! I may order a couple since they seem to always discontinue things I love.