The stuff sack says 650 fill, but it's not on the jacket.
The mens sm is slim fitting, so I bought one last week just because I like the fit. Unfortunately the armpits are kind of low, so raising your hands raises the jacket. Weights for the sm vary between 240g and 260g because there's a bit of variance for the fit and probably fill. I like the fact that back length is long enough. The zipper is hard to start. It has just a bit more loft than my Uniqlo parka.
While I had the scale with me, I weighed a sm vest - about 170g. They didn't seem as slim as the jacket and price wasn't reduced.