Inkjet printer compatible and perfect for use with address labels; not recommended for the laser printer Small envelopes are an economical way to send pictures, homeschool assignments, small papers, invites or classic 6 x 8 greeting cards Heavyweight 28 lb kraft paper envelopes are opaque to protect private contents; strong enough for bulk mailing or organizing the office Please don’t lick these envelopes; Quality Park Redi-Strip closures don’t require moisture—just peel and press for a safe, dry, sanitary seal