Sleeve easily slips on the wand of the Big Bend duster and then is secured with hook and loop at the base. Big Bend replacement sleeve features the original Starfiber, a revolutionary microfiber in an extra long fiber specially made for dusting. Electrostatic action attracts and traps dust, animal hairs, and allergens. Machine washable for over 300 washings. Refer to model No. WM710013292 MicroPlus Big Bend Dusting System for dust mop.