This brings on clamminess, and if you wear them long enough, you can get plenty wet inside. Gore-Tex outfits are much more expensive, and not entirely waterproof to boot. I solved the problem to a great degree by using a seam-sealer compound to waterproof all the zipper seams on my outfit that get heavily soaked. Otherwise, the advantages of the Gore-Tex outfits are terrific. If made of skin-protecting Cordura, as the better ones are, they can be worn instead of, and not just over, leathers.
Many riders carry slip-on rubber boots to put on in case of rain.
A good, albeit expensive, Gore-Tex glove is made by Held, a German company that uses Velcro fasteners for a good ergonomic fit. They are not, unfortunately, widely distributed in this country. Fogging can be a major problem in heavy rain. To wipe away the rain while riding, I use a Vee Wipe, an ingeniously designed mini-squeegee worn over a glove finger. Your braking distance can be much longer, and you are more likely to lock up the brakes by overbraking.