Thank for for ordering a FirePower Legging or Pants! All our stretch fabrics feature an EcoPoly fiber. This fiber is considered eco-friendly since it requires significantly less energy and water use during manufacturing. We feature a Thick elastic waistband finishing and cover stitched hems. Elastic generally will rise just under your belly button for most sizes; however, they are designed to be able to fold with secret designs or quotes inside each waistband to make your legging experience truly unique to each pair.