Tyvek Tamper-Evident Security Envelopes 9x12 Inches - White Plain Tamper-Proof Mailing Bags for Legal Documents, Sensitive Mail & Evidence Storage - Secure Shipping & Document Protection

Product Description

Envelopes feature flap with patented tamper indicating panel. Once flap is raised, the words "OPENED" appear in red and cannot be repaired to hide evidence of tampering. Envelopes are made of DuPont Tyvek so they won't rip, tear or puncture. Much stronger and more secure than traditional paper envelopes. Water-resistant and moisture-resistant envelopes are lightweight to save on postage costs. Easy to use. Simply peel and seal.