Packable Waterproof Rain Jacket, Men, Size: 34-36, Regular, Blue, Polyester, by Lands' End

With this jacket, keeping dry in the rain couldn't be easier. The lightweight fabric is seam-sealed to be 100% waterproof and the cuffs, hem and hood are adjustable to keep water out. And thanks to a clever 2.5 layer design, it's breathable too.

Not only that, but the whole thing packs down into its own pocket making it easy to keep handy.