These acid free envelopes are perfect for long-term storage of important documents, and also work well for organizing everyday papers. Protect your documents with durable poly envelopes that are tear and water resistant. Expands 1.25". Holds more than 200 sheets. Durable poly material is tear and water resistant and easy to clean. Hook and loop closure for added security. Acid free and PVC free. Seam Type: Weld; Flap Type: Cheese Blade; Security Tinted: No; Opening: Open Side.