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.
- Security envelope designed to be water and tear resistant
- Made of 100% high density polyethylene fibres (HDPE)
- Extra strong hot melt peel and seal closure
- Size: F4 (483 x 330mm)
- Colour: white
- Pack of 100