Gilly Hicks also had Yoga Thongs in the past. Not sure if they still do. They may
may also be found on Holister's website.
Can't find them!^ still looking
Gilly Hicks has only made one athletic thong that I can recall. It was their "no lines" seamless concept that had bonded seams and had no structure to it. In my opinion, this is the closest they got to a "yoga" thong:
Target's Exhilaration thong is really made for an active lifestyle. Dawn has had several pairs over the years...
American Eagle's Aerie also makes some great ones too. They're just called "seamless thongs" there.
And so does Aeropostale. I don't think I've ever seen a thong make a better VTL.