The main purpose of a rainsuit is still to keep water out. That's why manufacturers line zippers, buttons, and seams with high-tech coatings, and place storm flaps over exposed areas to help keep rain out. In fact, one of every 100 rainsuits are returned because they leak. Read labels carefully. Make sure the garment you buy is lined or coated.
Experts insist breathability is the most-important consideration in buying rainwear.
If you're in the market for a new rainsuit, look for durability and a timeless style. Quality liners stand up to heat from tumble drying, dry-cleaning chemicals, stains, body oils, and detergent. And they'll resist tearing. It will also be more versatile for a variety of climates. Don't compromise by opting for a pullover wind shirt, instead.