Gummed closure with commercial flap. Withstands extra handling and wear and tear better than standard white envelopes. Contains a minimum 20% post-consumer content. 28 lb. brown kraft. Ideal quantity for smaller scale users. Fantastic envelope for greater security. Next to impossible to see through and features a commercial flap. These envelopes are brown/gold in color and made from 28 lb. paper density that withstands extra wear and tear. Commercial flaps are rectangular with tapered sides, rounded corners, and a shallow, rounded point. This provides a greater sealing area for more security and protection. If you are concerned about your documents arriving safe and sound and need a larger than standard envelope, these are the envelopes for you! These are also great envelopes to store documents in or organize craft supplies. If you need a smaller envelope with these same great features, check out our other sizes!