Flexible, 1-piece polyurethane lens with wide field of vision is bonded to durable Hycar rubber Facepiece Dual-canister mount (NATO 40mm thread) allows weapon sighting from either shoulder Drinking tube provides connection for fluid ingestion in contaminated atmospheres Internal nose cup with 2 check valves deflects air from the lens, reduces fogging Standard mechanical speaking diaphragm included, or add MSA????s optional ESP II Communications System