Poly file jackets offer long-lasting, water-resistant protection for bulky or frequently handled documents. Made from durable polypropylene, these jackets resist tears, moisture, and general wear—perfect for offices, schools, or fieldwork. Available in bright colors for easy classification, many styles expand up to 3-1/2 inches, holding large files securely. Whether you're organizing active paperwork or archiving important records, poly jackets deliver rugged, reliable storage without compromising on visibility or flexibility.