Inturned lip aroudn the edge for secure, comfortable seal against the face. Large chin cup makes it easy to position. Five suspension headstraps and roller buckles hold the facepiece in place while minimizing hair entanglement. Wide polycarbonate lense is coated to resist scratching and chemical attack. Lens is held in place by a two-piece lens ring which is color-coded to indicate the size of the facepiece. Speaking diaphragm for clear, short range communication. Nosecup reduces lense fogging in low temperatures or high-humidity conditions.