10 x 13 Tamper Evident Tyvek Envelopes 100/Case

These envelopes are made from 14 lb. olefin, which makes them ten times stronger than regular paper envelopes. They have a unique seal. Once the seal is broken, the word 'OPENED' in red will appear on the flap, ensuring security.

To use these envelopes, simply place your items inside and seal the flap. Make sure to press firmly to activate the tamper - evident feature. When handling, be careful not to accidentally break the seal before you're ready. Store these envelopes in a dry place to maintain their quality. If you notice any damage to the seal or the envelope itself, it's best to use a new one to ensure the security of your contents.