67% microfiber, 22% polyester, 11% polypropylene, for use with the Pulse cleaning system with collapsible support, long lifespan, hook-and-loop fastening, dimensions: (L)40 x(W)14 x(H)16 mm (R050650 / Q470-88-BL00) with color-coded ribbons to classify the fringes washable at 90 degrees