MSA Gas Mask Facepiece for Ultravue and Ultra Elite Full Facepiece Respirators Ultravue facepiece is part of the Chin-Type Gas Mask, a protective system consisting of facepiece and canister. Scratch- polycarbonate lens that provides a wide field of vision. Features a nosecup that helps reduce lens fogging in low temperature conditions or in high-humidity conditions. . Pack of 1