The product is an expired 50-pack of 3M 9501+ Face Mask KN95 Particulate Respirator Masks. These masks are intended for personal, medical, lab, and industrial use, providing N95 and KN95 filtration efficiency. Made by 3M in China, this bundle of masks is a reliable and high-quality option for protecting against airborne particles and contaminants. Each mask is designed to offer a secure fit and comfortable wear for extended periods of time.