Tyvek White B4A P/Seal Envelope Pk100

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 330 x 250mm and are 100% recyclable. This pack contains 100 envelopes.