NEW Rainbow Vacuum E Series washable HEPA filter Washable Aftermarket HEPA Filter Made to fit Rainbow E2 2 Speed Vacuum. HEPA Filtration filters out 99.98% of air contaminates. This keeps dust, pollen and other allergens inside and out of your breathing air. Super convenient washable design allows you to clean this filter multiple times, elongating time between filter purchases. This aftermarket HEPA filter is sold by GV, who is in no way incorporated with the Rexair Company.