Features:

• MPR 1250
• High Performance
• Captures large airborne allergens like household dust, pollen and mold spores
• Attracts and captures microscopic allergens like pet dander, smoke, smog, bacteria and particles that can carry viruses
• Pack of 6 filters

Editor Reviews:

Product Description:
Sold as 6 each. The ultimate filter for allergy sufferers. Outperforms by 25% all other 1" filters. 15% better airflow than Red Filtrete. Lasts 3 months. 1250 performance rating. Mini-pleats for ultimate particle retention. Minimum Efficiency Report Value (MERV): 11. Shrinkwrapped. 16" x 25". Manufacturer number: 2001. Buy Hardware Supplies SKU #: 4186672. Country of origin: United States. Distributed by 3M Co.

Rating : - Works
No problems using it. While the filter is more restrictive, it seems to compensate by having more pleats (larger area).