Fiber material, locking water, resist skid.Wrap-round fiber Cleaning Pad, wipes the window to make a dry, spotless shine.reusable and washable, the cloths can be washed and used many times.Suitable for use on all window surfaces, to clean and remove the stains from your window or glass surface effectively, keeping your window cleanSuitable Model: For Ecovacs W830 Series W833 Robot Window Vacuum CleaningMop cloth:fiber deep cleaning, Strong water lock, strong water absorption, less water stains, mopping the floor clean, Absorbs water evenly and keeps moist for a long time.Colour: grayMaterial: fiberSize: about 220 x 220mmPackage Contents:6 x Window cleaning clothOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.