RE: S3 as a polarguard product - it really is. I found this article about it. Here is an exerpt: "By bonding Polarguard - a full-stretch synthetic continuous filament insulation - to a mechanical stretch lining, Consoltex is producing a lightweight insulated soft shell fabric solution that maintains the stretchability, breathability, abrasion and weather-resistance of a true soft shell through multiple wash cycles. " full article here: http://www.consoltex.com/pages/news/insulatedsoftshell.aspx?lang=EN-CA

To answer your questions:1) The Arcane is not a light jacket. It weighs in at about 32oz. for size Lg, but you have to keep in mind that this jacket was designed for durability, warmth, and stretch. If lightweight and packability are major criterias, this might not be the jacket for you.2) It does not have an insulated hood. The Recon IL (Polartech Powershield w/Hardface and Primaloft), which is very similar to the Arcane in design and features has the insulated hood. The Arcane's hood was designed to be more discreet by zipping into the collar. It does have a fuzzy, micro-fleece lining and is virtually windproof.3) This jacket is very versatile in that it can be used as an everyday, go-to jacket, is durable enough to withstand abuse that, say, a construction worker would put it through, but is also incredibly warm and stretchy for more active type activities such as skiing. You are right, it isn't a very packable jacket and not designed necessarily for winter backpacking, etc. I think it's an excellent belay jacket due to it's laminated construction (ie. no cold spots) and it's ability to take abrasion and move without being restrictive. Most who own one that I've talked to say it's quickly become their favorite winter jacket.The S3 is actually a Consoltex insulation similar to Polarguard (continuous filament fibers).