Southworth® 25% Cotton Business Envelopes showcase the importance of your correspondences. 25% cotton means enhanced texture, distinctive crispness and added durability that sets it apart from ordinary envelopes. Laser and inkjet compatible. Acid- and lignin-free. The Southworth® collection of business papers is truly among the finest papers available for professional offices of any size. Communicate in style. From the first moment to enduring memory, cotton paper adds a touch of class, making first impressions more impressive with a distinct crispness and an unmistakable feel. Someone picking up your document will know before they even read a single word that there's something special to it. Cotton fiber also provides archival durability it's the reason so many historic documents are still with us even centuries later.