I got an education in what Gore-Tex is today. It's a membrane that's waterproof and breathable. And to prove that to me, the Gore-Tex guys put me in a Gore-Tex rain jacket, pants and booties and stuffed me into a room where torrential rains poured from the ceiling.
I stayed dry, except for my hands, which were exposed. Afterward, the rainsuit went straight into the dryer.