RAIN WEAR
A lot has happened in wet weather technology in the last twenty or so years, and the evolution of technical outerwear and fabrics continues apace. The problem with rainwear used to be that when you were active in it you got as wet from sweating as you would have from the rain. In the late 1970's that changed with the advent of breathable waterproof fabrics. Gore-Tex® arrived on the scene in the late '70's, and many other breathable waterproof fabrics have also evolved since then.
No rainwear technology is magic though. None of them will actively transport moisture from you and your clothing to the external environment. They all rely on 'vapour pressure differential' to move moisture from an area of relatively high vapour pressure (usually inside the garment), to areas of relatively low vapour pressure (usually outside the garment). The difference for you between different fabrics comes from how they balance waterproofness, breathability, and durability.