Why doesn't felt dry?

Dense stuff, felt. And if, as sounds like, is attached to a backing piece it's all got to diffuse to the one exposed surface and evaporate from there; not both sides.

Plus, if the backing surface is porous, it may have absorbed a significant amount besides.

And, then, drying conditions may not be optimal if RH is high.

All kinds of reasons it could be slow...

Weird, It felt dry to me :)

A car's dashboard?

It rained on the lake near me and a 24 hours later it was still wet.

But it was a weird lake.

I don't think you missed anything. He was probably just suggesting that if the item is small enough it could be placed on the car's dashboard where the sun shining through the windscreen would warm it up and help to dry it quicker.

Wool fibers have moisture regain approaching 40% at 100 percent humidity. Compare to cotton at about 10% and nylon at 5%.

This high affinity for water just makes it harder to dry.

If the pad is thick and surface it is glued to is not permeable it takes more effort to dry. If area remains humid it will still retain moisture.

My wife put an oven glove made out of Nomex to dry on the deck the other day and it was still damp that afternoon when I went to use it and Nomex only has a moisture regain of 3.5%.

Yes, that's it.

Thanks, that's very useful.

It shudda clicked as wool jackets do tend to smell musty even after a drizzle.

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