Heavy-duty poly envelopes resist tears, repel moisture and is easy to clean. Available in bright translucent colors for easy organization. Gusset expands up to 1.25" to accommodate bulkier materials. Heavy-duty string and button closure is designed for everyday use. Acid-free, PVC-free. Top Loadi12i12i12Vertical orientation. Seam Type: Weld; Flap Type: Cheese Blade; Security Tinted: No; Opening: Open End.