waterboy you have a link. all the ones i see either cover way to much or the thong not enough. the one i posted before this is still my favorite so not sure I can find much better. I do have to admit when I went on vacation and was able to wear a desmit thong nothing is better. Wish I could wear that for lap swimming!

Desmiit Thong for lap swimming. Funny I was thinking about that today. It has a drawstring and is perfectly comfortable. Lined in front. Would allow even better leg movement.

Vega its https://www.kiniki.com/products/brazil-swim-brief-black but i have to say i dont think the photos there do it justice, it’s my goto brief for getting some sun

Muscleskins provide a drawstring option : https://www.muscleskins.com/custom-.html , last section.

Seat options at https://www.muscleskins.com/seats.html

Thanks for the link Mike, the lean seat looks great. Have you tried it? Any photos?

If you’re looking for a good ‘Cheeky or Rio’ rear styled option from “Muscleskins” you have to go for either their “Rio or Sport” back style options.......

Both look REALLY great with either their ‘Micro or Poser’ fronts.

I swim laps in my Neptune Scepter briefs... Not a Rio cut on the rear, but very comfortable. I too have the Seoban briefs with the pull string and like them very much and they are a bit more cheeky and low rise. several custom suit makers offer a tie cord which prefer for swimming. i have showcased several suits on my blog here on swimsuit reviews, so you might check that out too. the Muscleskins suits are made to order and are well made and reasonably priced.. i have them too and like them very much.

Muscleskins with a Rio back and poser style front pouch work really well. Comfortable for wear all day.