My 3 go-to thongs for working out are the 2xist Yback, Ergowear, or sometimes JM Skinz. All are perfectly supportive in the pouch and crazy comfortable. If you can find the 2xist in their Sliq fabric, that's a tad better I find, it's a little smoother finish. Plus, if you like a thinner more string-like back, they have that. Let us know what you go with...maybe even SHOW us what you go with? Take care!