Huff decided to wear the thong when the Giants needed a miracle (i.e. needed to win 20 of their last 30 games to make the playoffs). After putting the thong on in the locker room he said: "Boys, this is going to get us to 20-10." The company behind the thong also sees a winning opportunity. They've sent the slugger boxes filled with more thongs to distribute.
Huff is a good spokesperson too, explaining that "over time, it's actually gotten pretty comfortable." But the more important question is: does it get washed after every game?