Founded in 1988, the air purification company from Finland focuses on the commercial and military sectors, and is a key participant in Finland's Indoor Air Quality Standards, which are also a reference model for indoor air standards in the European Union, WHO, and the United States. In 2015, LIFAair announced its entry into the household products segment with the launch of a new brand and a full range of household products, including a particulate protective mask: LM99.
 
LM99 meets the second-level standard of Class A protection in the new national standard issued in 2016, and has a filtration rate of more than 98% for oily and non-oily particles, making it one of the masks with the highest filtration efficiency in this list, and is suitable for use in environments with PM2.5 concentrations of 350μg/m³-500μg/m³. In terms of fit, LM99 adds a groove structure to the bridge of the nose, which fits the skin of the face and is not easy to leak. Inside the mask, the skeleton and the filter element are welded to effectively prevent the misalignment of the two from affecting the protective effect. In the part where the cover fits to the face, LIFAair uses a technique similar to Shigematsu's "face cloth", adding an additional layer of sealing stretch cloth to fit snugly while remaining comfortable. However, LM99 is an ear-worn mask, which is easy to form strangulation marks on the ear, which should not be for a mask of 30 yuan/piece.
 
In contrast, LM99's children's model, LM95, includes three wearing styles: ear-wearable, head-worn and neck-wearable, which are suitable for different children's face shapes and various usage scenarios. Although there are no protection standards for children in various countries, LM95 has passed the tests of the US FDA, CPSSIA, and the European Union REACH and OKEO-TEX in terms of chemical and hazardous substances, so there is no need to worry about the damage caused by the mask material to children's health. In addition, LM95 is aimed at active children, with an increase in the caliber of the suction valve, an increase in exhaust volume, and a smaller expiratory resistance than LM99, so as to avoid children with low lung capacity from breathing poorly because of wearing masks. The LM95, which is close to 30 yuan/piece, has excellent performance in terms of protection effect and breathing resistance, and is suitable for consumers with a more budget.