Abstract: The subject disclosure relates to a plastic envelope suitable for mail automation processing. In an aspect, disclosed is an envelope apparatus having a first side portion, a second side portion, a bottom portion, an opening portion, and a foldable flap portion. In an aspect, the apparatus can have a first side portion comprising a first attached portion between a first transparent sheet and a second transparent sheet. Furthermore, the apparatus can have a second side portion comprising a second attached portion between the first transparent sheet and the second transparent sheet.