INCLUDES: 4 Premium Mask, 4 Premium 40mm Filter (ONE SIZE FITS ALL). Made in 2023 is Trusted by professionals around the globe. We provide cutting-edge equipment and self-defense gear that meets the demands of top-tier military operators-with key engineering enhancements to make them more practical and effective on the homefront, including solutions for children and the elderly. Dedicated to delivering superior products and unrivaled satisfaction! Made with High Quality professional grade material. Plastic lens made from premium plastic. The filter is made from Premium Aluminum (shell) with treated Charcoal (contents). Compact size and Easy to stockpile and suitable for long-term storage, the masks are safe to use for many years. The mask can seamlessly fit into any emergency preparedness or survival kit and features durable, rugged construction for reliable operation and protection when you or your family need it the most. Sizing: This premium mask is One size fits all. From kids to adults, the durable adjustable straps allows you to make a great fit. The 40mm Filter is BEST with the mask but can also fit ANY mask that has a 40mm thread.