Tear Resistant Gusset Pocket Peel and Seal Window White C4 324×229×25mm 125gsm

This range carries the impressive title 'one of the strongest envelopes in the world' and with good reason. Its tear resistant paper substrate will resist tearing under the strongest of hands and if your contents matter to you this has to be the product for you. Unique to Blake, a paper envelope that is tear resistant, water impermeable, burst resistant, grease proof and fully overprintable.