9 x 12" Tamper Evident Tyvek® Envelopes

These 9 x 12 inch Tamper Evident Tyvek® Envelopes combine the puncture, tear, and moisture resistance of 14 lb. spunbonded olefin with a built-in tamper-evident closure system. Once the seal is broken, the word "OPENED" appears permanently in red on the flap — providing an unambiguous, visual record of any unauthorized access that cannot be concealed or reversed.

That chain-of-custody visibility makes these envelopes a practical fit for legal firms shipping contracts and executed documents, healthcare organizations transferring patient records, financial institutions routing checks and sensitive correspondence, and HR or compliance departments handling confidential personnel files. Any environment where confirmed seal integrity must be demonstrable upon receipt benefits from this format.

Constructed from Tyvek® spunbonded olefin, these envelopes resist the moisture, abrasion, and rough handling common in transit without adding significant weight. The 9 x 12 inch interior opening accepts standard letter-size and legal flat documents without folding. Each case contains 100 envelopes and ships via parcel carrier.