The Honeywell Optifit full face mask is designed for repeated use. It is made of silicon, equipped with a 5-point fully adjustable harness and polycarbonate visor. It conforms to EN 136: 1998. The actual filtration depends on the filter used. The mask is compatible with the front mount Rd 40 x 1/7“ thread filters (sold separately), for example P3 filter from our offer providing reliable protection from viruses and bacteria. It is designed to be used in the atmosphere with 17 % of oxygen, which means in regular conditions – oxygen constitutes about 20 % of the Earth's atmosphere. It can also be connected to the Compact Air A150401/A150102-00 filtration units.