The FUJITRAIL™ WATERPROOF jacket is one of the most advanced jackets in the ASICS running collection. It's an advanced jacket that's functional when you're running the elements. Co-created with our roster of trail athletes, this jacket was tested in technical mountain conditions to help protect against rain and wind. This jacket is fully waterproof, lightweight, and breathable. It packs into its own pocket and is made with Pertex™ Shield fabric from Japan. Its ergonomic design and drop shoulder construction improve freedom of movement while also making it practical for wearing over a backpack.