Compatibility and usage - Perfect compatibility with Dreame X40, X40 Pro, X40 Ultra, X30 Pro Ultra, X30 Pro Plus, L10s Pro Ultra, and L10s Ultra Gen 2. Please check your robot vacuum model before purchasing. - Not an OEM product. The use of the brand name or model name is solely to show compatibility. Value package - Great Value Package includes 15 pieces of high quality dust bags compatible with Dreame X40, X40 Pro, X40 Ultra, X30 Pro Ultra, X30 Pro Plus, L10s Pro Ultra, and L10s Ultra Gen 2. - A cost-effective way to supplement your spare dust bag supply for your robotic vacuum. Material and environmental details - The X40 Ultra dust bags are made of melt-blown fiber filter materials and non-woven fabrics. They effectively block dirt, pollen and small dust particles. - The non-woven fabric is decomposable within 1-2 months under natural conditions and will not pollute the environment. - All parts of the dust bags use environmentally friendly materials. Upgraded performance - Best Upgraded Dust Bags are sealed by professional machines for stronger filtration. - They filter up to 99.9% of dirt, debris, pollen, small dust particles and airborne substances, helping to maintain a cleaner indoor environment. Use scenarios - Pet owners: capture pet hairs and dander to keep floors and air clearer between cleanings. - Allergy-conscious households: reduce pollen and fine dust in the living space. - Small to medium size homes or apartments: maintain clean floors with efficient dust bag performance between robot vacuum maintenance.