"Moderator's Note: mschrant is the Chief Operating Officer of Climashield"
wow ! I just got back from China for the XX th time and finally decided to reply to all of the experts on this site. I have read it for many years just trying to see how everyone views insulation and how it works versus the marketing push that is applied. In general, there is a lot of mis-information and playing with the test that occurs. I have worked with different insulations for over 20 years testing both sleeping bags and insulation. When I say testing, I have monitored testing data by location in the sleeping bag as we changed the properties of the insulation from fine dienier cut staple to continuous filament high denier. I have watch field tests for the military and I have traveled to plants all over asia and the US and seen the following.
Above all the loft, loft recovery, and resistance to compression are what drive the thermal efficiency of a sleeping bag. All of the marketing info that says we are warmer because we have smaller fibers is simply not true unless you have the same loft. In the case of Primaloft, it has very little loft, even smaller resistance to compression, and cannot compare to Climashield in a sleeping bag. Why do you think Climashield it is in TNF's high end bags? If you like TNF of not you need to understand that they do the most lab and field testing of any sleeping bag manufacturer in the US.
On the other hand, Climashield is not as "packable" as primaloft. This is for the same reason that I just stated. It can't be, it has a higher loft and higher resistance to compression. At the same time Climashield can meet the same loft and thermal efficiency as primaloft, it will just be much lighter when it does it.
When it comes to jackets, Primaloft is thinner (not warmer) at the same weight and is more uniform to look at, It is also softer.
Though many people think Climashield is a new company, They are the same people that made Polarguard for 20 years. They are also the same people that have supplied the US army in the Modular sleep system using various insulation for 30 years . The recent Marine 3 season bag which was designed to improve the thermal efficiency while dropping the weight 20% and the size 20% also has their insulation in it. This was not because primaloft was not working to get into this business. Please note that Primaloft was developed for this business. Primaloft was developed as a down replacement by the US Army and Albany International (Primaloft parent) for sleeping bags. If you read their literature, they are very proud of this. In order to verify their success they compared other cut staple fibers and a Polarguard variant to their new invention. They then dropped the fine denier cut staple and began to purchase bags with first Polarguard and now Climashield. This has been the same story for thirty years. Primaloft has never had this business.
The military constantly tests the insulation. First, in the lab and then in the field. In sleeping bags, Climashield always wins. Why do you think Primaloft has tried to introduce a continuous filament version into the market for sleeping bags. It is because, if you test Climashield versus Primaloft, at the same weight , Climashield will always be a better product.
This may seem extremely biased toward Climashield and anti-primaloft but I'm just stating the facts. Additionally, Thinsulate has even worse problems. That's why they are not in sleeping bags at all. If we discuss jackets a lot of this story changes (sort of)