Heavyweight project folder features archival-quality polypropylene with built-in antimicrobial additive to prevent the growth of bacteria, fungi, mold and yeast. EPA registered and FDA recognized. Design is open on two sides with thumb-cut front for easy access. Folders reduce glare and hold letter-size documents.Heavyweight project folder features archival-quality polypropylene with built-in antimicrobial additive to prevent the growth of bacteria, fungi, mold and yeast. EPA registered and FDA recognized. Design is open on two sides with thumb-cut front for easy access. Folders reduce glare and hold letter-size documents.