I wore one of these shirts on a 13-hour saltwater fishing trip in Florida, and it provided complete protection from the sun. The shirt was surprisingly cool for having long sleeves. I didn't want to wear my $40+ sun protection shirt because I knew it would get stained from a long day of fishing and handling bait. I was really surprised when all of the stains came out in a normal wash cycle. I have long arms and the sleeves were a little long; otherwise, the fit was great. These shirts are a great value IMO.