Eco Four Twenty Personal Air Filter - Official Replacement Filters (2 Refills in 1 Box) Write a review | Ask a question Sold out $14.99 SKU 6846R 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out SET OF TWO: In 1 Eco-Friendly Box, You Get 2 Official Replacement Filters for the Eco Four Twenty Personal Air Filter LONG LASTING: Lasts Up to 500 Exhales Before Needing to Be Replaced. The Average User will use this for 2-3 months. HIGH-QUALITY 2 STAGE FILTER: Activated Coconut Shell-Carbon Filter + HEPA Filter means this filters more than cheap competitors! EASY TO REPLACE: Simply Unscrew the Eco Four Twenty Personal Air Purifier and replace the filter. It takes only 3 seconds! LIFETIME WARRANTY AND 100% COVERED BY MONEY BACK SATISFACTION GUARANTEE: If For Whatever Reason you Don't Love Your Eco Four Twenty product, Simply let us know and We Refund Your Money.