This Nylon Windbreaker Coaches Jacket has waterproof nylon fabric with snap front closure. The Nylon fabric interior is coated with a 100% waterproof coating... however, we give this jacket a Water Resistant rating since the seams are not waterproofed, which may allow water to eventually enter through the seams when exposed for extended periods of time in a downpour. But we’ve cruised this jacket a good bit and it’s been awesome. We know you’ll like it!