Super warm base layer!
Under Armour Base 3.0 Quarter Zip Shirt has a fantastic combination of features to help you combat the coldest of conditions. The waffle pattern is very soft to the skin and traps your body heat nicely. A trim fit along with a slight touch of stretch ensures your range of motion is not restricted or your flopping around with unnecessary material. Lastly, the zipper allows you to vent when it gets a bit hot.

Outstanding product
Outstanding product are the words that come to mine when I think of this product. A true base layer for those extra cold days, hunting or just being outside. If it's windy, don't ware this product by itself as it will not stop the wind from chilling you. It's made to ware under a coat or wind breaker. I was holding back on buying this product because of the price but after I wore it last winter while hunting it was worth every penny. If you are looking for a product that will keep you warm on those really cold days, this is it.

Good As A
This base layer is very good to wear when the tempature is 40+. It fits close to the body and the material is soft.I like to wear it as a regular shirt so you can the outlines of your physique.I like the style and comfort of the shirt.

Awesome shirt for winter
This is a very warm shirt and I love it. It is very light. It fits pretty well to the body without being too tight. I am 5'10" and 160 pounds. Size small actually fit me perfectly. I went to a football game and it keep me warm the whole game. It is great when you only need one layer plus a jacket during the winter. However, it's too warm when you are active such as skiing. Nevertheless, the shirt kept me dry and kept me warm. This is definitely design for cold weather and low level of exercise. I will recommend the cold gear if you want to stay warm while being active.

Warmest thing you can buy.
The Under Armour Base 3.0 is the warmest gear you can buy. Super comfortable and it allows you to wear less layers. I wear the tops and bottoms under my waders in the winter and there is nothing that compares to their performance.