If you think the floating DWR down is impressive, try washing a Wiggys sleeping bag in the bath
It's like trying to drown a loose bag full of greased footballs.
I've used a Wiggy's bag (Climashield Combat I believe) alongside the highest quality down with different Pertex DWR shells in extreme cold for 2 weeks solid and I know which works better for me-the synthetic, hands down.
My down garments need caring for with Vapour barriers and protecting from the moisture, my Wiggy's bag doesn't. My down garments will suck up moisture through the shell from the moisture in the atmosphere, the Wiggy's doesn't.
Maybe the DWR treated down
is better. I imagine it is knowing the water repellent properties of its treatment but I know 100% it's not down to the quality of the DWR on the shell that the down gets damp and loses loft in some environments.
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