I absolutely love these underwear and have a hard time finding them in the store in my size. I like the mixture of materials used nylon/poly blend. I find that these are great for hiking and working out becuase they whisk the moisture at a fraction of the cost of other undergarments.  I like they so much I wear then every day. I find that they run true to size, don't shrink and stand up to multiple washings. I owned my first set since July and they have been washed weekly ...the elastic is still in great condition. Worth the price and I highly recommend these!