JRP Girls Flat Knit Cotton Tights. These JRP cotton tights fit a little small but more true to size than Butterfly. These have a good fit and last well. In the photo with 6 colors of tights, medium gray is on the left, charcoal gray is in the middle, and dark charcoal is bottom right. Dark Charcoal Gray is a winter color that's very dark. Charcoal Gray is basically a medium gray and is the most popular gray, it can work all year round. The color called Medium Gray is the lightest gray and is good for the summer. 70% Cotton, 27% Polyester, and 3% Spandex.