NIOSH N95 approved with an inner foam that provides a custom seal. Protects against ultra-fine particles Inner soft foam nose cushion Yellow color-coded double straps NIOSH N95 approved HY9810 and HY9810-LTC are Metal-Free 9500-N95 & HY8710 have metal nosepieces Medium/Large size How to Properly Put on and Take off a Disposable Respirator: https://www.cdc.gov/niosh/docs/2010-133/pdfs/2010-133.pdf