ROOF is a specialist manufacturer of protective equipment with a high reputation in Europe. In addition to isolating particulate matter, ROOF's masks also have the function of blocking bacteria and liquid spray, which is suitable for more use scenarios than ordinary masks, and the price is also higher. In 2014, UNICEF's medical masks were sent to Ebola-affected areas in Africa for use by local health care workers.
 
Most of ROOF's masks can be used for up to 40 hours, which is higher than that of 3M, Honeywell and other manufacturers. The 231 that meets the FFP3 standard uses a polyester yarn synthetic rubber filter element, which can not only filter more than 99% of particles, but also pass the EU EN14683 test, and the filtration rate of bacteria has also reached more than 98%, which is a high-risk protective mask. However, this mask does not contain an exhalation valve, which makes it more resistant to exhalation during daily use.
 
For consumers who only need particulate protection, 246V is more recommended. The mask also has the filtration efficiency of FFP3, while the internal non-woven fabric uses ultrasonic welding technology, the stitches are soft and not easy to deflate, and it is equipped with an exhalation valve and an adjustable headband, and the price is slightly more than 231, but it is worth the price in terms of comfort.
 
If you are in a place where the ambient air pollution is low and you are sensitive to the stuffiness of the wear, you can choose the 245V series with a filtration efficiency of FFP2. This series has one less layer of filter layers than 231 and 246, the protection efficiency is reduced, but the exhalation resistance is also reduced, and the cross exhalation valve located on the right side of the mask body will discharge the hot air in time, and the mask will have a more ideal temperature, and the stuffiness feeling has been significantly improved. The 245CV is a model with activated carbon, and the rest of the features are exactly the same as other models in the series, which is suitable for those who need to filter out odors and have a budget.