Keep your vacuum running strong with this 20-pack of replacement bags from Clean Fairy! These bags are designed to work with Windsor Sensor S12, S15, XP12, XP15, XP18, SR12, SR15, SR18, and Versamatic Plus models. They also fit Sebo C, G, and X series upright vacuums, plus Kenmore Professional Series units that use Kenmore Type W 50015 bags. Just a heads up - they DON'T work with Sebo Felix series, Sebo Airbelt K2/K3, or Windsor Versamatic 14\\\ and 18\\\ models. Each bag provides excellent filtration to keep dust and allergens contained while maintaining strong suction power. Having a 20-pack means you're set for months (or even years) of regular vacuuming without worrying about running out. The bags are aftermarket replacements manufactured by Clean Fairy, offering great value compared to OEM options. When it's time to change bags, simply remove the full one and pop in a fresh one - your vacuum will thank you with consistent performance. Many users find these bags perform just as well as the original manufacturer versions but at a more budget-friendly price. The packaging clearly indicates this is a compatible product, not made by the vacuum manufacturers. If you're unsure about compatibility, check the pictures for size details or contact the seller before purchasing to make sure they'll work with your specific vacuum model.