This is an excellent base layer that provides warmth and is very comfortable. However, the product description is NOT correct. This mock shirt is NOT an UnderArmour compression t-shirt, it is a matching t-shirt. As a result, it is not skin-tight like the compression shirt, but has a more figure-hugging cut. I prefer this tailored fit over a compression shirt, but it's still a bit tighter than the regular fit. However, it's warm as a base layer, although too warm as a training tee. I wear it for outdoor activities like snowshoeing, biking, cross-country skiing or as a casual base layer under a fleece or flannel shirt. It's stylish and comfortable.