Rain is calming, refreshing, and beautiful, but this is generally only the case when you're looking out the window at the rain. When you're outside, you need protection. Here are three things to look for when you get a rain jacket. Waterproof Design Just about all rain jackets are designed to keep water out; however, they aren't all designed to keep water off. Regular jackets will absorb some of the water and slowly drip water throughout the day until it has dried.