Not often that I can say a piece of clothing has changed my life.  Being a pretty big dude, when I get hot I tend to get drenched.  As I often wear long sleeve dress shirts for work, this has always been somewhat embarrassing.  These undershirts work.  They really keep the moisture off of me and off my shirts.  They somehow dissipate it off into the air.  I had a few that arrived in my order with a tiny hole near the neckline.  Not a big deal but I did let the seller know in case it was a batch defect.  They immediately sent me replacements.  Excellent product and customer service!  Be sure to wash these on delicate and do not put in dryer.  Hang up and let them air dry.