I’ve been searching around for answers to this question for a while and can’t seem to find any advice. I keep my horse in a field that tends to get muddy in the winter/spring months, and usually when I come to ride he’s covered in mud up to his knees. I always end up rinsing his legs off with clean water, then waiting a while for them to dry. My question is should I be waiting for his legs to dry completely before polo wrapping them for riding? It certainly takes up a lot of time that I can’t always spare when I’m at the barn. If anyone knows the science behind it that would be interesting to learn 
I would think the fleece polos would wick moisture off the legs just as a fleece cooler wicks moisture out of the coat (no matter how long the hair coat is)…might take a little longer due to the wraps overlapping themselves…Try it once and see what happens; one time is not going to give him a raging case of rainrot.
I would not want his legs so wet that the wraps would be getting soaked and retaining water through your ride. In that case, I would ride without wraps. If legs are slightly damp, it should be fine.
Keeping his hair on the shorter side would help. And hose off first, towel dry, then wait to wrap till last. You don’t need to completely shave the legs but depending on how hairy your horse is that time of year, a bit of a trim could go a long way to helping you with this issue.
As kids we played polocrosse, sometimes in pouring rain, and never had an issue with wet polo wraps (and I had a super sensitive chestnut TB who got rubs and skin crud from everything.)
