The yarn of our MaxiDust Loop-End Dust Mop is made from traditional long, stapled, tightly-twisted virgin natural cotton. The 2-ply loop-end cotton yarn construction prevents fraying and unraveling and makes laundering easy. Slip-on slot pocket, easiest and fastest method to secure dust mop to frame. Loop-end yarn makes laundering easy, quick-dry polyester backing. Fits standard 5 in. dust mop frames