Originally I was a little skeptical knowing these underwear had a percentage of polyester in them. I just couldn't imagine them being comfortable or breathable. However after wearing them, I found that they were comfortable and an overall good deal. The only negative for me is the slightly tight waist. Apparently in their sizing, I'm on the upper end of the scale. I usually wear a Large in underwear, but these are running just a bit small in the waist. I guess I should have ordered the next size up. Lately with underwear I've been buying, I'm either getting them too big or too small because all the brands are sizing differently. Better luck next time.