As its name suggest, this type of raingear is totally waterproof. Second to none, when it comes to heavy rain waterproof gear will insure that you still completely dry underneath your jacket and trousers. Goretex is the most common material used to waterproof gear and is far and away the most effective waterproofing fabric there is. It uses a porous membrane either between fabric layers or laminated to a layer. The membrane openings are small enough to exclude liquid water, but large enough to allow water vapor and air to circulate. This can be an advantage when you are playing in periods of extended rain.
To get a 100% waterproof suit or item you may need to reach deep into your wallet, but there is no substitute. When buying a waterproof suit or individual jacket or trousers you should try and find outerwear that offers a guarantee. The top waterproof manufacturers should offer a three-year waterproof guarantee with their clothing and this is worth the extra investment.
Commonly mis-interpreted as waterproof, rain or showerproof outerwear is the secondary form of defence against wet weather on the golf course. Rainproof gear is not made using Goretex and is typically made from a fabric that is treated with Teflon. This means it tends to keep water from penetrating for short periods, but allows air through and may wick moisture through during long exposures. Slightly more lightweight and less expensive than a waterproof jacket, it is ideal if playing in short showers, but will not guarantee to keep you dry in longer showers.
Windproof clothing does exactly what it says, protects you against wind. Its technical construction is developed to produce materials which prevent the wind from passing and remaining highly breathable in the meantime. It is the most efficient choice when your playing in cold and windy conditions, but is rarely waterproof. Some windproof items are also treated with Teflon to offer a slight degree of water resistancy, but they are not designed to be worn in wet weather. Not as expensive as either waterproof or rainproof gear, they are a warm option for cold weather.