Korean arm covers
A common trend in Korea- arm covers.
Why? Because unlike the favored tan look in the states, Koreans don't really like to get dark. The whiter and "milkier" they look, the better.
Anthony bought a couple packs to help protect his arm from further sunburning (as you can see in the first picture.). These can be bought almost anywhere and for super cheap. I think he paid 50 cents to a dollar for his pair.
At first it looks a little weird and appears that it would be hot wearing it all day, or even uncomfortable. But he says it actually feels cool on his arm and really does help from further burning. You'll also see many of bus and taxi ajusshis wearing these so that their driver's arm don't turn out darker than the other. Pretty clever....