When you consider what you want in your rain gear, Stratus checks all the boxes. The fabric was developed by Sun Mountain’s Japanese partner specifically for use in hot, humid climates. It has a 20K/20K waterproof/breathable rating, mechanical stretch for freedom of movement and is lightweight and comfortable. Adding to that, the Stratus jacket has a packable hood and front and back venting for added breathability. Two-year waterproof guarantee.