Tough, brightly colored polypropylene envelope is as durable as it's attractive. Gusset expands up to one and a quarter inches to accommodate bulkier materials. Heavy-duty string and button closure is designed for everyday use. Heavy-duty poly interoffice 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. Heavy-duty string and button closure is designed for everyday use. Acid-free, PVC-free and archival-quality. • Ultracolor Expandable Poly String Tie Envelopes.
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