Sunscreen Clothes
"For the life of me, I don't know what good that will do," Dr. David Leffell, a professor of dermatology at Yale University, told ABC News. "By definition, most of the body is uncovered, so the rationale of sun-protective clothing in the bikini escapes me." Ref. Source 4
I don't see how having a sunblock shirt on is going to protect your face or arms or hands? I guess there must be some usage I'm not seeing but it seems like a pointless invention.