The ErgoTec Ninja Washer Sleeve The new Unger ErgoTec Ninja Washer Sleeve guarantees exceptional cleaning results due to its highly absorbent material and built-in rows of scrubbing fibres that run along the length of the Sleeve - they work exceptionally to loosen dirt and grime without damaging windows. The Ninja Washer sleeve also features two abrasive pads, one on each side of the sleeve. This provides extra scrubbing power for removing the most stubborn dirt. A Velcro fastener also ensures a secure fit onto the T-Bar, plus the Washer Sleeve is machine washable up to 500 times! The ErgoTec Ninja Washer Sleeve is available in sizes ranging from 10'' to 30''. Please see our 'Related Products' tab to view the product page for the Washer Sleeve, where all sizes are available.