I ride in the rain all winter. It's fine. Go to a dive shop and buy a pair of dry suit leg seals. Put them on your bare legs, then your socks, then your shoes, then your booties. Pull the dry seal down over the top of your booties, zip your leg warmers or tights down over the top of the leg seals. Dry feet forever. You may have to trim the legs seals slightly to size them to your feet and ankles.