On the insides

handy front zippered pockets allow you to reach your keys or cell phone easily and an adjustable elastic cord at the bottom can be drawn tight to help trap in excess heat

Each of these envelopes features a vflap and a reliable gum closure

yet durable plastic based foil material

JAM Paper #10 Business Envelopes, 4 1/8 x 9.5, Dark Red, 1000 Pack (31511298B) VariesBy:envelope_colour_17838:Red|envelope_size_8174:4-1/8" x 9-1/2"|envelope_pack_size_1000101:1000 Pack On the insidesJAM Paper Dark Red #10 Business Envelopes measure 4 1 8 x 9 1 2 inches in size and are made out of 28lb, high quality, acid free and archival paper. These envelopes feature a beautiful, elegant, and stunning dark red color that makes them great for both personal and professional mailing purposes. The size of these envelopes makes them ideal for 3 times foled standard sized sheets of paper. Use them to send letters, documents, and more from your office