RipStop is constructed of 99% polyester/1% carbon fiber material. Medlines exclusive RipStop fabric is constructed with texturized polyester yarns and a fluid repellent finish. These single-ply wrappers offer a texturized non-slip surface for improved friction. Wrappers also contain carbon yarns to assist in providing static control in your critical environment. Pearl-stitched edges are color coded for easy size identification. Ciel Blue.