Defender Safety- UASTM Level 1 Face Mask, Pleated, Blue, 3 Ply-50 Pack, MADE IN USA Case Pack: 40/Box (2000 Masks) 50 Masks/Box - FDA 510(k) approved - Bacterial filtration efficiency ≥95% at 3 microns - Particle Filtration Efficiency ≥95% at 0.1 microns - Differential Pressure less than 6 mm H2O/cm2 - Resistance to penetration by synthetic blood at 120 mm Hg - Flame spread - Class 1 Exceeds ASTM F2100-19 standards to provide superior protection Boxes with gold packaging (ASTM Level 2) ASTM F2100-19 Level 2 Tested Polypropylene wrapped metal nose wire Ear Loop not made from natural rubber latex. 3 ply Characteristic Level 1 Bacterial filtration efficiency ≥98% Sub-micron particulates filtration efficient at 0.1 micron ≥98% Differential pressure, mm H20/cm2 (Breathability) <6.0 Resistance to penetration by synthetic blood, minimum pressure in mm Hg for pass result 120 mm Hg Flame spread Class 1 ASTM Level Masks are the standard for surgical procedures. They are a cost-effective solution for general use, particularly to protect users against a splash or spray at arterial pressure. These are disposable, single use, and non-sterile. The Defender Safety Surgical and Procedure Mask line are FDA 510(k) approved and have been tested in accordance with ASTM F2100-19 and ISO 10993-5,10. Inner Fabric: Spun bond Polypropylene, Middle Fabric, Melt-blown Polypropylene, Outer Layer: Polypropylene, Ear loops: Spandex, Nose piece: Polypropylene wrapped metal wire. Developed, Distributed and Made In USA