The MSA Advantage 3100 Full Face Mask Respirator Gas Mask in size Medium is a high-quality mask designed for industrial use. With a 40mm NATO/RD40 filter class, this mask provides excellent facial coverage and protection against various gases and vapors. Made in the United States by the trusted brand MSA, this model ensures a secure fit and reliable performance for a range of applications. Whether for personal protection or professional requirements, the MSA Advantage 3100 is a trusted choice for those seeking a reliable gas mask.