This is a Patagonia Houdini Jacket ◎ It's very light, and it's recommended to always keep it in your bag. I bought it a few years ago and only tried it on, so it's in good condition, but it has wrinkles from being stored. I think the wrinkles will come out if you hang it up. I usually wear a size M, and this fits just right. Quoting from the following site: A 100% recycled nylon jacket that provides protection against bad weather and can be carried anywhere, including for intense activities. Made in a Fair Trade Certified factory.