This is an amazing product. They are very comfortable and if you search you will also find them in various types (mini bikini, panty etc.)  The best part is they show no panty line even under the tightest and whitest pants.  The down side is the micro fine elastic threads tend to pull out during washing (I don't take time to hand wash) but it doesn't seem to make a difference in their long term wear.  I have pairs that are three years old and doing just fine.