These tyvek envelopes are made from 100% recyclable, high density polythene fibres hdpe, which is tear and water resistant for extra security in transit'. '.strtoupper('t')hese envelopes have an expanding 38mm gusset and extra strong hot melt peel an... These tyvek envelopes are made from 100% recyclable, high density polythene fibres hdpe, which is tear and water resistant for extra security in transit'. '.strtoupper('t')hese envelopes have an expanding 38mm gusset and extra strong hot melt peel an... The unique fibre structure of tyvek security envelopes, developed by du pont, is tear and water resistant for extra security during transit'. '.strtoupper('t')he envelopes also feature an extra strong hot melt peel and seal closure and are lightweigh... These tyvek envelopes are made from 100% recyclable, high density polythene fibres hdpe, which is tear and water resistant for extra security in transit'. '.strtoupper('t')hese envelopes have an expanding 38mm gusset and extra strong hot melt peel an... These tyvek envelopes are made from 100% recyclable, high density polythene fibres hdpe, which is tear and water resistant for extra security in transit'. '.strtoupper('t')hese envelopes have an expanding 51mm gusset and extra strong hot melt peel an... |