Swiftwater Rainshell Jacket Filson's most packable and waterproof jacket, the Swiftwater Rainshell Jacket keeps you comfortably dry when caught out in wet weather. The 2.5-layer nylon ripstop construction offers waterproof, breathable performance, while the adjustable hood, hem, and cuffs help you further batten down the hatches. This coat has been used for one season and has normal wear. See photos for discoloration. Price reflects the usage.