The Unger ErgoTec Ninja Sleeve, 18", is engineered for professional window cleaners requiring superior water retention and scrubbing power for large glass areas. The sleeve's microfiber construction absorbs substantial amounts of water, reducing the need for frequent bucket dips. Integrated scrubbing bristles and two abrasive side pads effectively tackle stubborn grime, ensuring spotless results. The hook and loop fastener ensures secure attachment to the T-Bar, facilitating easy installation and removal. The sleeve is machine washable up to 500 times, offering durability and cost-effectiveness.