The showers that bring spring flowers rarely keep city dwellers inside. For next Spring/Summer expect men to take to the streets in fashion-forward raincoats and parkas in sheer nylons or new soft vinyls. These featherweight slickers come in solids or prints, and can be sophisticated enough to layer over a tailored suit or playful enough to adapt for young men or even kidswear. Lengths range from fingertip to almost-ankle; hoods and drawstring hems are key.