The 6 X 9 booklet envelopes are one of most popular envelop choice for offices and businesses. These envelopes are much larger than regular #9 and #10 office envelopes and are often used to send single folded or unfolded pieces of documents. The 6x9 booklet brown envelopes are made using 28 lbs or 105 gsm brown Kraft paper. These envelopes are highly durable and carry more weight than regular 24 lbs 6 X 9 envelopes. Companies ordering these envelopes can choose to get their black and white business logo printed on them for free. These envelopes come with traditional and familiar moisture-activated sealing systems.