Kites brown board backed envelopes are manufactured with a strong 120gsm front paper and 550gsm grey board backing to keep a range of documents/items free from damage during transit. All of our brown envelopes are printed with a “Please Do Not Bend” message on the front for maximum protection, instructing handlers not to bend or fold and ultimately damaging items inside. Similar to our white solid board mailers, these envelopes also feature an easy peel and seal strip. Simply place contents inside the envelope, remove the peel strip and seal to secure. These envelopes are also recyclable.