A cute Thai thong with the sexy sounding wording muay Thai... No, this is not the sound heard when kissing Thai women. Muay Thai is an old martial art also known as Thai boxing or kick boxing. And no, you don't practice it wearing a thong.
What puzzles me is why it says it is made in the USA, as for sure you can find better looking thongs when shopping in Thailand for a much cheaper price.
If you are looking for Thai girls wearing thongs, you should head over to the free Thai Online Dating page.