ProCare® Knee Wrap, One Size Fits Most Packaging:1 Each Respirator class N95 (NIOSH approved) MCK_1006100_48 CS Respirator class N95 (NIOSH approved) NIOSH approval TC 84A 0006 Model 3M 1860 and 1860S (small) Shape Molded cup dome Surgical clearance FDA cleared surgical mask Fluid resistance ASTM F1862 at 120 mmHg Bacterial filtration (BFE) Greater than 99% (ASTM F2101) Particle filtration At least 95% of non oil airborne particles Nose clip Adjustable aluminum with soft nose foam Headbands Two braided Shelf stable and convenient for easy storage and usage Sleeve can accommodate buttress pad for additional patellar support For thighs up to 17 inches in circumference (measurements taken 6 inches above mid patella)