TNF bag question?

hard to believe no one has any info for me ..but I will try again thx

The North Face had several synthetic bags in their Flight series: Propel and Fission are two I recall, both no longer made I believe. The Flight series was designed for light and fast.

I have no experience with the synthetic bags, but have both the down bags in this series: the Beeline and the Hightail. The cut of the bags is the same: roomy around the torso for the option to layer a jacket if needed, but a tight cut around the legs for the lightest possible bag. The down is high quality at 900 fill, the shell Pertex Quantum. The Beeline has no zipper, the Hightail a very short one. These are bags focused on keeping you warm. Great bags if you are skinny and don't care about a zipper. I love both of mine.

I don't have experience with that sleeping bag, but I've owned a North Face Cat's Meow now for several years and like it. Polarguard 3D is older insulation, but was great in its day. Polarguard replaced 3D with Delta (which was a bit warmer per ounce). Primaloft has since surpassed Polarguard (in warmth per weight) with some of their latest stuff. Polarguard 3D is fairly durable (for synthetic) so it probably still has most of its loft left. You are the best judge for fit, of course. I think the only way to really test a used bag is to use it and see if it is warm enough. If you got a really good deal, then you could always use it for a car camping bag.

A while ago, I researched the temperature ratings of TNF bags and compared them to the results of the standardized European EN 13537 tests. For down bags, the results pretty much matched the ratings given by TNF. The ratings of the synthetic bags were found to be around 10F too optimistic. This matches my own experience with synthetic TNF bags. So, if you're like the "standard man", the Flight will probably keep you warm down to 45F.

I have owned TNF Flight 35 degree 3D bag, 2 lbs 3 oz, for many years. I am a warm sleeper. I found the 35 degree rating right on. I have slept in a tent in this sleeping with midweight underwear in the upper 20's last year and I was just a little chilly. But, remember, I am a warm sleeper.

This has been a very good bag. It packs small and it is warm for the weight.

It has lost some of the loft over the years.

thanks everyone for the feed back reseved, it really helped thanks again.. Don