*50-Pieces* 3M Particulate Respirator KN90 Protective Face Mask W/Headband 9002. The manufacturing is 6-26-2019 (See attached pic) 3M States 5 Years to expiration: 3M 9002 Shelf life of unopened product is 5 years from date of manufacture when stored within temperature range of -20°C to +30°C and at less than 80% relative humidity …