I'm pretty happy with the material and quality of these undies. I use them for working out and so far they have been mostly comfortable and or I forget I have them on. I've washed/dried them and they have held up good. I have escaped the dreaded panty line with these under my workout leggings. I wish there was some cotton in the material to make them a little more comfortable as I am a sensitive skin type, but again I'm happy with them. Would purchase again.