Protection from winter sunshine!  I guess it might work in the summer as well, but I've only tried it at Christmas time and only in foreign countries.  This is tight, or rather if you buy the size you think you need it will likely be tight.  I think that's right and its way better than sunburn and way more convenient then trying to wipe yourself down with sunscreen a few times a day.  I could do without the logo mostly cause I hate logos on my close that I paid for since I paid for them.  If I was getting a discount or was sponsored by the company then Id proudly wear their logo, but that's not the case with this one. I looked for logo-free shirts like this and they were more expensive.  What a drag!  So I bought this one and go over myself.