How many ounces of down are in this?

Backpacking Light just released their review on this piece. http://www.backpackinglight.com/cgi-bin/backpackinglight/patagonia_uldownshirt_review.html Insulation is 2 oz (56.5 g) 800 fill-power down, and the shirt came in at 5.62 oz (159 g) for a size Medium.

For what it's worth, a Patagonia rep told me today that the UL Down has the same fill weight as the standard Down Sweater, 85 grams (3.03 oz.)

KJ, I have never seen Patagonia release the fill weight info on their jackets, so unless someone here has some inside scoop, you may be out of luck getting that number. I tried to find out on the online chat at the Patagonia website and the representative told me he didn't know. The main competitor here seems to be the mont-bell Ex Light Down jacket, which has 1.8 ounces of 900-fill down, so I can only imagine this is close to that. The mont-bell piece has 7-denier nylon, the Patagonia has 10-denier, and the Patagonia saves weight with the quarter-zip setup, which may permit extra fill and accommodate the heavier shell fabric while still coming in lighter than the mont-bell jacket (per Ty's post, above, as compared to the mont-bell website). Other than that, it may come down to personal preference, fit, experience, and your confidence in the manufacturer and the company. Both Patagonia and mont-bell have excellent reputations. I bought the Ex Light Down jacket a while back, but returned it because of the sizing; none fit me well at the time, but I think I was caught between sizes. I really like mont-bell's stuff, but the Patagonia clothing seemed to fit me better. I am currently in the market for a down jacket, and may try mont-bell again. Good luck.