Simply peel off the release strip and press! With Office Depot self-seal envelopes, you will get your mailing tasks done quickly and easily. Save time mailing your documents, so your clients can get them sooner. Self-sealing envelopes are made from white woven paper for durability. Form a secure seal quickly, with no moisture required. Open-end design, allows you to fill envelopes quickly and easily. Security tint provides privacy of contents.