It truly is invisible underneath a dress or any clothing item. So far I have worn it twice under a thin dress and not one line was visible anywhere. The heart shape that goes on the back is also very cute and the front covers everything that needs to be covered.
I would recommend this item to anyone who need a thong that is truly invisible (and cute!) that does not have any straps.
The product is available at: https://www.amazon.com/Style-Invisible-Panty-Strapless-Express/dp/B01HTQP4S0/ref=cm_rdp_product