1. Superior Material: The coffee filter is made of 304 stainless steel with a double reinforced 0.2mm thick filter. As a result, the extraction time can be reduced and the extraction rate can reach an optimal level. Our coffee filter has a mesh size of 600, which is larger than that of ordinary filters, ensuring that no coffee grounds enter the cup and do not affect the coffee's taste. 2. Reusable: The portable coffee filter holder retains the oils in the coffee and preserves the rich taste of the coffee. Disposable paper filters are made of wood pulp. When purchased in large quantities, they tend to deteriorate and are costly. Reusable stainless steel filters are economical and a good choice. 3. Portable and Durable: Reusable coffee filters are suitable for business trips, traveling, camping, etc. They can be used separately and are easy to transport. Anytime, anywhere, you can use our coffee filters to get a great cup of coffee. 4. Easy to clean: This reusable coffee filter is a two - layer stainless steel mesh filter: one layer is a 600 mesh filter + a fine mesh filter, which helps you get a great - tasting coffee. The package also includes a black cleaning brush to facilitate cleaning the coffee filter after use. It is also dishwasher safe. 5. For Deep L lovers: simply heat the permanent coffee filter in hot water and rinse it well, add coffee grounds, slowly pour hot water and let the coffee flow through the filter. When finished, remove the filter and enjoy your coffee. The coffee taste is smooth and delicious. The filter can make 1 to 4 cups of coffee, so you can have afternoon tea with your family.