I bought several of these t-shirts a few years ago. You felt great, especially at the gym. I bought more of these so I thought. What arrived were labeled perfect t-shirts. They didn't feel the same, but they were close. The tags were an annoying change. The quality of these shirts has declined significantly. After a few washes, the armpits came loose at the seams. Holes also form easily in the material. I'm not impressed. Revain lists nano shirts and perfect t-shirts, but at Hanes they belong to the same product line. You get whatever Revane throws in the box. Disappointing.