Product Description PROVEN TO BE MORE EFFECTIVE than other masks with straps and bands: Wein Products is proud to introduce the revolutionary Fitseal FS400 N-99 Respirator mask. Born from years of research and development, the Fitseal mask is the next generation for enhanced respiratory protection. Its patent pending technology enables it to mold to most facial contours to form an adhesion seal between the respirator and the face, virtually eliminating inward and outward leakage common to conventional respirator masks held in place with straps, rubber bands or nose clips. Respirators that dont seal properly around the face offer only an illusion of protection, per OSHA. The new Fitseal mask is approved by NIOSH under rule 42 CFR part 84 and has met the additional testing standards for new technology as part of respirator certification. Simply said, the Fitseal mask exceeds N99 specifications making it the most effective mask on the market by leaps and bounds. Used for: SARS, Swine Flu, Avian Bird Flu, Hurricane/Disaster Cleanup, Emergency Responders, Terrorism, Medical, Industrial, etc. Wein Fitseal Masks are in stock and ready to ship. Now is the time to prepare for your family and also your customer base.