White window mailing envelopes

• Dl window envelopes have a long shelf life.
• Dl window envelopes have a peal and seal closure.
• Dl window envelopes are fast, easy to use and hygienic.
• Dl window envelopes offer the tightest and most secure seal available.
• Dl window envelopes are the made from bright 100gsm paper.
• Dl window envelopes are tamper-resistant closure avoids the need for security separations on the rear of the envelope flap.