Pulling on our Sherpa-Cotton leggings is like wrapping your favorite blanket around your legs. We've chosen the thickest and most plush cotton to wrap your legs around for superior warmth. What sets our Sherpa-Cotton leggings apart? Our competitor's cotton leggings claim to be designed for cold weather. yet they're only slightly thicker than normal leggings. Our leggings feature a thick plush interior that effectively insulates heat without adding extra bulk. and helps to prevent chafing.