1 Professional filter: the same filter as the professional espresso machine, double-layer structure, the inner layer is woven by ultra-fine metal wire with high density to isolate coffee powder, and the outer layer is thick stainless steel sheet light perforated. 2 Easy to clean: ABS material is selected, which has good self-cleaning performance. The stainless steel mesh is polished so that the coffee grounds are difficult to adhere, and the front and back sides will be cleaned after flushing. 3 Food contact grade ABS double-layer 304 stainless steel filter has a fine inner mesh, good filtering effect, thick outer mesh, and firm support. 4 Environmental protection and money saving: reusable coffee filter. It is more environmentally friendly, economical and practical than using plastic cups, reducing your drinking costs. 5 Multipurpose even outdoor use: It can work well on a tall coffee mug, in the office and home for personal as a coffee maker, portable for short distancing backpacking, and for the camping and hiking.