Just having a look around at some various synthetic insulated jackets today, and stumbled upon this:
TNF Red Blaze Jacket
http://www.thenorthface.com/catalog/sc-gear/men-39-s-red-blaze-jacket.html
Most important were these few specs:
Shell: 1.9oz/sq yd nylon
Insulation: 133g PrimaLoft Eco
Total weight: 12.4oz
This is rather remarkable, no? That's 1.5 or 2.5x the amount of insulation as similar jackets at that weight. Examples:
Patagonia Micropuff Jacket
http://www.patagonia.com/us/product/mens-micro-puff-jacket?p=83907-1
Shell: 1.7oz/sq yd nylon
Insulation: 100g PrimaLoft Sport
Total weight: 16.4oz
Lighter shell fabric, lighter insulation … but ~4oz heavier? Huh?
Or this:
Montbell Thermawrap BC Jacket
http://montbell.us/products/disp.php?cat_id=2002&p_id=2301140
Shell: 12 denier ballistic airlight (which we know is really light)
Insulation: 50g Exceloft in sleeves; 80g Exceloft in body
Total weight: 12.8oz
This second example has significantly lighter insulation, probably much lighter shell fabric, but weighs the same??
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So … there you have my quandary. Either The North Face has stumbled upon a rather impressive new method for constructing these things (and is not making any noise about it) or the listed specs for the Red Blaze must be wrong somehow.
Whatcha guys think?

