Hi Charles,

Just preliminary feedback from a week with a Big Agnes Pitchpine UL45, which has "DownTek" water-repellant treatment on its 850-rated fill. Wasn't in soggy conditions so don't know how it would fare if not allowed to dry from day to day. I can say there was no clumping or apparent moisture buildup during a week in the Lasen backcountry, but only the first night were we threatened by the weather. We did sleep by lakes every night where condensation could be heavy when we were sans wind. Left the fly off the tent anyway, to catch the night skies.

In sum, a cautious endorsement acknowledging I didn't press the technology in a meaningful way. It doesn't seem to affect loft, as the down's rating seems borne out by the quick recovery when pulled from a stuffsack.

Contra that I've had enough soggy down kit to appreciate the technology's promise.

Cheers,