Tyvek F4 Open End Pocket Envelope_67154 483X330mm F4 S/S 100/Pk
The unique fibre structure of Tyvek Security Envelopes, developed by DuPont, is tear and water resistant for extra security during transit. The envelopes also feature an extra strong hot melt peel and seal closure and are lightweight to help keep postage costs down. These envelopes measure 483 x 330mm and are 100% recyclable. This pack contains 100 envelopes.