304 stainless steel mesh. 5 layer construction. Most durable filters in the industry. Outperforms the others in clean air testing. Assures cleanest air possible from washable filter. Provides balance between air flow and peak filtration. Lifetime no hassle warranty.
Product Features:- Multi-Layer Construction
- Most Durable Filters In The Industry
- Outperforms The Others In Clean Air Testing
- Assures Cleanest Air Possible From Washable Filter
- Washable And Reusable
- Made In The USA
- Lifetime No Hassle Warranty