100% recycled - this product was made using wood sourced from a certified managed forest. Deliver priority forms in envelopes you can count on: Quality Park Recycled Open End Catalog Envelopes. Protected by durable paper and secured by strong latex closure - no moisture needed - just press for a secure seal - the contents will arrive safe and sound. Seam Type: Center; Flap Type: Cheese Blade; Trade Size: #10 1/2; Security Tinted: No.