Tailorable: pure cotton, soft and for you to cut according to your needs, insoluble in water, non-stick, excellent water absorption effect Replacement cycle: After 3-4 months of use, the humidifier filter should be replaced according to the water, so as to keep the spray clear and the sprayed water cleaner Easy to use: just cut the humidifying stick to a suitable size and put it directly into the humidifier, or you can completely soak the replacement stick in water before putting it into the humidifier to enhance the filtering performance 50 pieces per pack: sufficient number of humidifying sticks, so you don ' t need to purchase extra for a period of time, keeping the indoor space clean all the time Humidifier special: pure cotton, natural without decolorant, has good water absorption, absorbs flying or sediment invisible to the eye, and purifies the space in