N95 is an American specification for respiratory equipment that’s broadly equivalent to the European P2 specification. It has a maximum filtration efficacy of 95%. Note: N95 must not be confused with KN95, a Chinese equivalent that has appeared on many second-rate products that flooded the market in the wake of the COVID-19 outbreak.
P3 is the recognised standard in the UK and Europe. N99 and P3 are the respective specifications for dust masks with a maximum filtration of 99%. This protection level is recommended to safeguard against asbestosis and silicosis risks during dust producing activities.