In case anybody else is interested, Cabela's has a couple Primaloft insulating jackets similar to the Spindrift on sale right now. I got the pullover in Med Tall and it weighed in at 12 oz it is however 60g Primaloft. I think the full zip weighs a bit more since it's 100g. Not bad at $70 or less.
http://www.cabelas.com/product/Cabe.../1386437.uts?WTz_l=Header;Search-All+Products
http://www.cabelas.com/product/Cabe.../1386437.uts?WTz_l=Header;Search-All+Products
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