Eric H.wrote a review of Giordana NS-Air 20 Wind Jacket - Men's on May 25, 2016
Familiarity: I've used it several times
This packs down much smaller than any "ultra-thin" VEST I own. Maybe the size or a Powerbar folded in half. You could easily stuff it into a tennis ball. Drape it on your finger and there is no sensation of weight. None. I estimate +/-50 gram. Fit is Euro-snug and only slight flapping at shoulders at 30 mph. Does seem windproof. Very nicely made, seems like it is holding up fine despite the ultra-sheer material. Only negative so far is that the elastic of the cuffs fit snug so have to remove gloves in order to take it off.