updates /
Footjoy Pro SL Waterprrof Issues?
You can make the materials waterproof, but the design and use means that water gets into the sock front the ankle area (especially if there is any padding their!) as well as the tongue. It can even wick in via the laces.
So, walking on damp fairways they should (will) stay dry inside but one short trip through wet rough and the exposed padded liner areas will absorb enough moisture to soak the sock pretty quickly.
Shoes like the dryJoys Tours, or icons, don't have the exposed padded liner areas and have more sealed tongues etc
Short of wearing boots of some sort the idea of keeping moisture out of a low golf shoe in any really wet conditions seems a little strange to me - don't get me wrong, I have many pairs that will happily stand in a couple of inches of water for hours on end without anything getting in (so they are waterproof!) but in use the same shoes will 'leak'