Effective Filtration: 4 Packs Replacement Pre-Filter For Blueair Blue Pure Air Purifier, Effectively Prevents Larger Particles From Reaching Your Main Filter, Extending Its Life And Maintaining Optimum Filter Performance For Longer. | | Easy To Install: Simply Remove The Older And Dirty Fabric Pre-Filter And Replace It. Vacuum The Fabric Or Toss It In The Washing Machine Whenever It Needs Cleaning. | | Valuable Package: The Package Includes 4 Replacement Pre-Filter, And 2 Different Colors: Lunar Rock, And Diva Blue. Add A Splash Of Color To Your Room. | | Premium Quality But Affordable Price: We Deliver High-Quality, Durable, And Long-Lasting Replacements, Allowing The Filter To Last Longer. They Are An Efficient Investment. In Order To Improve The Performance Of The Appliance, Please Replace Or Wash The Pre-Filter Every 2-3 Months. | |