"Waterproof/breathable raingear offers protection from the elements on a number of fronts: It keeps rain on the outside: Waterproof/breathable rainwear is constructed using a membrane or coating that serves as a barrier that rain cannot penetrate. The outer surface of most rainwear (known as the face fabric) is also treated with a durable water repellent … Continue reading How Raingear Works | REI Expert Advice