The product is a lot of 4 x 3M N100 Particulate Respirator Smoke Protection Masks with an exhalation valve, specifically the 3M 8233 model. These disposable filter masks feature a full facial seal, molded design, and universal mask size, making them suitable for various individuals. Manufactured in the United States, these N100 filter class masks provide reliable protection in industrial and business settings, ensuring the safety of workers from smoke and particulate exposure.