I got the pants and shirt set. I'm used to bundling up a ton during late season. Wearing the base layer shirt, a long sleeve shirt, a sweatshirt, and my hunting coat was far too warm. You only need to wear this shirt and depending on the weather and your coat, the shirt and coat are fine. But when sitting for a long time, I like to do the base shirt, sweatshirt, and coat. Also, I love the thumb holes. They keep that part of your wrist between your coat and gloves nice and warm. Be prepared to shed a layer if hiking! These base layers are great and durable. I haven't had any seams come apart or any holes develop.