I love the durability and resistance to odor these shirts provide. They are quite light and soft but provide nice insulation as undershirts. They are comfortable as a stand alone t shirt year round. I have used them (in the past) for trailrunning and cycling and wear a little more quickly because of the sweat and more frequent washing.
Rated 4 out of 5
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is Just Right and 2 is Runs Large