I bought this for walking on treadmill and kayaking.  The material feels a lot like cotton but smoother which had me worried.  However after 45 minutes of exercise I knew I love this shirt.  Does not hold perspiration long and feels lite and dry.  My back was still wet but much better than a cotton tee shirt.

I don't like the logo on my shoulder.  I keep thinking its a spider or something and it freaks me out.:p I am sure I will get use to it.  I may buy a darker color next which should help.