I have two of these shirts and have got say, They're Great!!! I have had several opportunities to wear them outdoors during extremely sunny days and they provided excellent protection and helped keep me cool. I have started keeping one of them in my primary vehicle and will either use it as a lightweight jacket for cooler evenings or throw it on to protect from the UV rays. Looking forward to wearing them while fishing, biking, and hiking this Summer. My wife also likes the feel of them so that's even better if I decide to get additional colors seeing how she approves of them. One last comment: They can be wadded up to near nothing as far as size/space is concerned, easily fits into a Camelbak or cargo pocket.