Michael,
Down analysis of both simulated and real conditions tells me the following:
-Moisture-regain is a function of the intrinsic material reaction to water as a gas. Untreated down at 100% RH has a maximum moisture regain of ~15%. Tests conducted on DriDown show a 33% improvement in moisture regain to ~10%. In contrast, PET (synthetics) average 2%. All of the conventional down fluorocarbon treatments should yield similar results to DriDown. The Encapsil product treatment should THEORECTICALLY yield moisture regain similar to PET. This is because the coating is more uniform in a plasma chamber.
-Conventional DWR uses fluorocarbon spikes that can lie down in as little as a year just from the pollution in the air. Smoke, water, dirt, etc. accelerate the process. Reactivation is similar to the surface treatments on WPB jackets. The silicone in Encapsil is inert and shouldn’t degrade for the life of the product.
-Total garment/quilt/bag liquid water absorption is directly proportional to the thickness (interstice volume) regardless of the insulation type. This same phenomenon applies to PET as well as all down.
-The demos of down floating in a beaker of water indicate that waterproof down will make you invincible to water but the tests indicate a modest improvement, with the potential exception of Encapsil.
Most of the above is just summary statements from more detailed posts I have made previously. When the price of Encapsil comes down, it will be a significant advancement. The other treatments are currently affordable but offer more modest improvements.


