Instruct: Classify the given review into positive or negative sentiment.
Query: Don't waste your money

Don't waste your money on this product. I can't recommend them because the fabric isn't stretchy enough to give that nice sexy contour and for the same reason they are not comfortable. For some strange reason they also have two layers of fabric. This is quite unnecessary since one reason to wear thongs is to reveal a bit more than regular underwear and therefore it's nice if they are slightly see thru.