This is a pretty nice polyester shirt; it is pleasantly soft and slightly stretchy. It's not heavy and won't keep you warm in cold weather, but it's good when it's a bit chilly outside or when you need UV protection in the summer. I'm tall and the sleeves are nice and long which sometimes isn't, but most of the shirt is oversized - I usually wear a L which I have but it looks more like an XL. If you're in between sizes, maybe take a size down to start with.