TO SAFEGUARD THE INDOOR AIR QUALITY OF YOUR FACILITIES AND TO OPTIMIZE THE PERFORMANCE OF YOUR VACUUM CLEANER CHANGE FILTERS ONCE THEY ARE HALF FULL. THE OPEN-COLLARED DESIGN MAKES EMPTYING AND REUSING THIS PAPER FILTER EASY AND THE DUAL-LAYERED CONSTRUCTION OF PREVENTS CAPTURED PARTICULATES FROM ESCAPING THE VACUUM AND DISRUPTING THE AIR QUALITY WITHIN YOUR WORKPLACE. FITS GOFIT 3 BACKPACK VACUUMS IS A OPEN COLLAR AND COMES IN A PACK OF 10. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" PROLEVEL FILTRATION - PROTEAM'S® PROLEVEL FILTRATION SYSTEM PROVIDES ADVANCED PROTECTION AGAINST THERE INTRODUCTION OF POLLUTANTS BACK INTO AN ENVIRONMENT LARGER CAPACITY - PROTEAM'S® INTERCEPT MICRO FILTERS HAVE 21% MORE FILTRATION AREA THAN NON-PLEATED FILTERS LONGER FILTER LIFE - FULLY LAMINATED INNER LINER ELIMINATES SHREDDING IMPROVED AIR QUALITY - DUAL LAYERED CONSTRUCTION CAPTURES FINE PARTICLES IMPROVING INDOOR AIR QUALITY. INTERCEPT MICROBIAL TREATMENT HELPS CONTAIN ODOURS AND PREVENT THE GROWTH OF MOLD AND BACTERIA REUSABLE - OPEN COLLAR DESIGN MAKES EMPTYING AND REUSING THE FILTER SIMPLE AND EASY PERFORMANCE - CHANGE FILTERS ONCE THEY ARE HALF FULL FOR OPTIMAL VACUUM SUCTION KEEP YOUR VACUUM IN GOOD WORKING ORDER BY USING GENUINE PROTEAM® REPLACEMENT PARTS INCLUDES 10 PACK OF FILTERS WITH OPEN COLLAR FITS GOFIT 3 PARTNERS IN AN EDUCATIONAL CAMPAIGN ABOUT INDOOR AIR QUALITY ISSUES. THE AMERICAN LUNG ASSOCIATION DOES NOT ENDORSE PRODUCTS