The Naked thong by Calvin Klein is unbelievable comfortable. The sales girl at the store said they feel like you are wearing nothing at all, they don't bind or tug anywhere and definitely don't show through your clothes.
Boy, they weren't kidding! You actually forget you are wearing these things. Everything the sales people said was true, they are fantastic. Let's face it we wear thongs so we don't have panty lines but sometimes with certain fabrics the outlines can show through - not with these and the best part is they are soooo comfortable.
Well worth the $20 price tag.

The Calvin Klein Lingerie store had them in black, white, nude, red and hot pink. The website offers them in black and white.
This is how they are described on the CKU website "Ultra lightweight. Feels like nothing at all. Seamless and tagless. Imported. 78% Nylon, 22% Lycra. "