The following materials are used in the production of V4400 N95 Mask. Straps- knitted elastic Nose Foam- Polyester Nose Clip- Aluminium Filter- Polyester/polypropylene Standards: Venus V4400 respirator meets the requirement of NIOSH N95, EN 149:2001+ A1: 2009 & ISI 9473. Approvals: V4400 respirator has been evaluated in the laboratory and found to comply with all of the requirements of Title 42, Code of Federal Regulations, Part 84 for NIOSH certification.