1Block Fine Dust: Prevents fine dust and particles from entering the breathing machine tubing system, thus protecting the machine, providing clean air for the elderly. 2Perfect Fitment: Suitable for Yuwell breathing machine, wonderful replacement for the old or broken one, easy to install, bring you convenience. 3Filter Set: 10pcs of filter are available, meet your replacement needs. Important and necessary accessory for breathing machine, simple and practical. 4Soft Cotton: Breathing machine filter adopts cotton fabric, safe and eco friendly, soft and skin friendly, regular filter replacement helps extend machine service life. 5Multiple Applicable Place: Light weight and in small size, easy to store and carry, can be easily put into your bag, perfect for home, hospital and health center.