I purchased this shirt for camping in cold weather, and since it's made from significantly thick wool material it does a great job of keeping you warm.  But, you should know that this shirt is uncomfortable without an undergarment of some kind. Against your skin it's scratcy and irritating, which can be the case with wool, but I have other shirts that are similar blends of wool and nylon that aren't as 'scratchy' as this one.  That's why I rated 4 stars and not 5. Nevertheless, this shirt is a great cold weather asset.  The snap closures are  easier to use than buttons when your hands are cold, or you're wearing gloves.  The double snaps on the cuff are a quality addition that allows you to wear this shirt over other shirts and still snap the cuffs.

It works well as a shirt-jac or as the only shirt you wear, which makes it valuable over a range of temperatures.  It's my 'must have' shirt for trips into the outdoors.