PH wrote:I also have a non cycling specific Parmo jacket, it's good if it's cool enough, or I'm not riding very hard, though it's a bit of a chore to keep it waterproof.
Wash it in pure soap once in a while, wash it in TX-10 once every quite a long while. It's not really any worse than keeping the DWR on the face fabric of a conventional waterproof in trim. On a conventional waterproof "reproofing" doesn't actually affect the waterproofing, but if does affect the ability of the outer fabric to shed drips rather than have them soak in and create a water layer over the waterproof barrier rendering it pretty much not breathable.
If the DWR in a Paramo is out of sorts the liner will stop acting as a "pump", moving water to the outside layer. The outer shell just has to keep the worst off so the liner isn't overwhelmed, it isn't and doesn't need to be waterproof.