These yoga pants are very nice. They are made of nylon and spandex with mesh around the knees, I guess for breathability.
So far I really am loving these yoga pants. The mesh around the knees helps me with sweating during a workout, plus the seem to bend at the knees a lot better than most I have worn. The material is nylon and spandex but so very soft. I have, so far, only had the opportunity to use them a few times but they seem to be holding up really well through washing. The waistband is a bit larger than some and I imagine could be folded over if you like to wear them that way. All in all this appears to be a good product for money.
I received this item for free or at a discount for my honest review.
Have a great day!