Smead Poly Side-Load Envelopes, 1 1/4 inch Exp, Letter, Six Colors, 6/PackHeavy-duty poly envelopes resist tears, repel moisture and are available in bright translucent colors for easy organization. Gusset expands up to 1 1/4" to accommodate bulkier materials. Hook-and-loop closure is designed for everyday use. PVC-free and archival-quality. Acid-free. File Jackets/ Sleeves/Wallets Type: Expanding Envelope Jacket; Material(s): Polypropylene; Height: 11 5/8"; Width: 9 3/4".