3M 6500 series half mask. A reusable half mask designed for enhanced durability, more comfortable contact with the user’s face and a wide unobstructed field of vision. Reduced heat and moisture inside the face piece thanks to Cool FlowTM exhalation valve. Twin filter design, bayonet connection system. Depending on the filters attached the mask will provide protection from gases, vapors or/and particulates. Available in three sizes: S (6501), M (6502), L (6503)