Briefumschläge

These criteria apply to paper envelopes folded of a sheet of paper or board and having a flap. Envelopes with a window are included and the material of the window patch may be of another material than wood fibre. Also envelopes with protective padding are included in the productgroup, provided that both the padding and the walls of the envelope consist of paper, either virgin fibre or recycled paper.
Plastic envelopes are not included.