Office Depot Brand double-window self-seal envelopes are designed for holding W-2 laser tax forms. The pack of 25 envelopes for tax forms have a security tint to protect sensitive information. For use with Office Depot W-2 laser forms (sold separately). Use for delivering important tax documents. Security-tinted, 24-lb paper is durable and keeps your contents safe. Double-window design shows both return and mailing address information. The self-seal closure on the envelopes makes it easy to close and secure your tax forms.