Are you serious or are you fucking with me? The tee is 175 grams. I don't have the technical sheet on the thermals but it's like comparing apples to oranges. The texture , weight, weave, composition, and feel are all different. Everything is different.If you are serious I will call the mill and get the technical sheet and give you the weight even though the two fabric have different properties even if the weight is the same which it's not.