Probably one of my favorite tank tops for comfort. I love the materials Champion uses in these ones - soft, smooth, breathable, a little bit of stretch, and just the right thickness - not too bulky for a 2 layer shirt.Seems like it would wick well for athletic purposes, good balance of breathability and insulation.I normally wear a 2X so I was iffy about the XL here but as other reviewers have noted, these run like half-a-size to a size big. For me, this was a good thing, but if you like tight form fitting shirts you should probably order a size down!