https://drenalin84.tumblr.com/post/1...ine-stringtime
I tried these out last Summer although I was initially hesitant and skeptical simply because they seemed more designed as underwear but I was pleasantly surprised.
They are very revealing but, if 'string' style you're looking for, than that won't be a concern.
They greatly reduce tan lines and hold up very well after multiple use in water and even retain their color after prolonged use in chlorinated pools.
I bought these off EBAY from a Chinese company for less thamn$4.00 USD with free shipping. Very cheap but I've ordered a couple more as I liked them so much.