Procedure earloop face masks provide ASTM Level 1, 2 or 3 protection as well as optimal comfort and breathability. Non-woven spunbond polypropylene outer layer provides maximum protection against fluid penetration High-quality media ensure optimal filtration and breathability Inner layer is made of dye-free non-woven spunbond polypropylene thatwill not lint or tear during use Ample-length earloops are soft, strong, free of natural rubber latex, ultrasonically sealed, and attached to the outside of the mask to prevent pulling and irritation Adjustable, enclosed, plastic-covered, iron nosepiece providescustomized protection and comfort Shingle pleat design prevents fluid pooling and cross-contamination Made in North America to meet the highest quality and regulatory standards. Packaging: 50ea/bx, 10bx/cs (500ea/cs)