Southworth 25% Cotton Business Envelopes showcase the importance of your correspondences. 25% cotton means enhanced texture, distinctive crispness & added durability that sets it apart from ordinary envelopes. Laser & inkjet compatible. Acid- & 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 & 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. Seam Type: Diagonal; Flap Type: Commercial; Trade Size: #10; Security Tinted: No.