(White) Confidential and safe content: White opaque, American and windowless paper envelopes guarantee the content and confidentiality of your mail. You can use them both in your document submissions, notices, wedding invitations, gift envelopes or small objects, as well as to store your papers. DL paper envelopes are ideal for sending documents, letters and invoices safely and professionally. ✅ EASY SEAL STICKER - Shipping envelopes include a self-closing rubber strip that makes it easy to seal and tamper-proof packaging. Their standard size fits perfectly with a sheet of paper folded in thirds, which makes them a convenient and inexpensive option. ✉ Quality Paper: 90gsm FSC certified paper envelopes, environmentally friendly shipments. All components of the envelope are 100% recyclable. 👉 Paper Envelopes: Various shipping formats available to suit your needs. Send postcards, documents, notices, invitations or invoices. DL envelopes can be customized with a company's logo, contact information, or corporate design, reinforcing brand image and promoting company recognition.