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When sending very important items via mail, the durability of the envelope is a crucial concern. Offering a much more durable alternative to paper envelopes, 10X13 - 14 Tyvek open end is made from spun bonded Olefin. This makes the envelopes extremely durable and it allows them to resist moisture and tears. The envelope also comes with the branded Kwik-Tak sealing system. Much more efficient than traditional gummed seals, this seal requires no moisture. Users simply have to peel the tape, close the flap, and apply pressure. This envelope has a bright white color and it has a blank, windowless design. Being catalog or open end envelopes, the flaps are located on the shorter end. These envelopes have a mid-seam construction and rectangular flaps. Ideal for unfolded A4 sheets, these envelopes measure 10 x 13 inches and offer a flat space of 9.75 x 12.25 inches. These 10X13 - 14 Tyvek open end Kwik-Tak envelopes are often used for sending international and long-distance mails.
The Tyvek envelopes are just what I was looking for all those years! its great for mailing important documents and small objects. Its the real Tyvek material which can't be torn or damaged in transit.