Leafed through a Campmor catalog and saw the description for some Terramar men’s knit boxers. They gave it a UPF rating.
Why? Do many guys run around outside in their boxers?
It makes me think of the bra-thing that’s fastened to the insides of the Astral Bella PFD. It’s not going to add any support, so just why is it there.
pardon my ignorance
what is a UPF rating ?
m
UPF rating
a google search showed: http://en.wikipedia.org/wiki/Sun_protective_clothing
While not a huge concern for Norther hemisphere paddlers right now, here Downunder we always look at the UPF rating on a garment, just not on underwear, unless trying to emulate the Superman outfit 
I think the idea
came from this thread:
http://www.paddling.net/message/showThread.html?fid=chat&tid=1377964
hey bow , maybe
read the OP again .
Marketing gimmick.