This is a Columbia nylon jacket. I bought it at a used clothing store, but I don't think I'll use it, so I'm selling it. It's a bit oversized for a size S. The waterproof coating on the inside has deteriorated and is flaking off, so you'll probably need to wash it to remove it... It has various detailed features. You can ventilate it by opening the zippers under the arms. Type: Soft shell jacket