I, as many other legging wearers, have embarked on the quest to find a comfortable thong to work out
in in order to avoid awkward panty lines.
And culprit has provided a pretty solid answer. They're thongs are made of a quality material, so they don't feel flimsy like a lot of thongs out there. Plus they are breathable for everything down there. Once I put them on I practically forget about them whether I am just out and about or going to the gym.
I ordered a small (for reference my waist and hip ratio is about 26in to 39in). If I let them sit on my waist then they do create a smallish gap in the back. I don't want to go any smaller because I know the rest of the fit would be too tight. However, this gap is easily adjusted by having the thong sit just below my natural waist. This issue could also be because I have a shorter torso. Plus it was only something I really noticed when I was just wearing the underwear. Once I put something over it - jeans, leggings, skirts - I didn't even think twice about it.
I would love to replace all my thongs with these if they price was a little cheaper. But for now, having 3 is better than nothing, and I don't regret the purchase because they do what I want them to do, are comfy, and high quality material.