HODOmask is a mask composed of 5 layers, using a PTFE nano-porous membrane as the filtering material, created through a unique technology called HYPROOF. The HYPROOF technology allows for a structure with high porosity (nano pores) with irregular permutation, ensuring the filtration of more than 95% of particulates up to 0.3µm. It is therefore the ideal companion for protection against fine dust, bacteria, and smog! HODOmask is NOT a PPE, NOR a medical device.