The Ultralight Jacket does what it says on the tin. It's extremely lightweight by utilising a 1.5-oz. Cordura? ripstop nylon shell and the PrimaLoft? Gold 60-gram insulation. The Ultralight Jacket will retain 98% of its exceptional warmth when wet, meaning if you do get caught up in the odd storm or two you'll still be warm. High-quality finishes with molekin-lined handwarmer pockets and collar from Filson.