Envelopes
Bong Tyvek C4 White Peel and Seal Pocket Envelope 55 GSM, Pack of 100 (00011782)
Tear-resistant, lightweight, water resistant, non abrasive, silky surface Unique fibre structure guarantees ultimate tear resistance Strong Hotmelt peel & seal closure for a secure and fast seal 100 Envelopes
https://www.bizrate.co.uk/envelopes/bong-tyvek-c4-white-peel-oid5244043998.html