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. Seam Type: Diagonal; Flap Type: Commercial; Trade Size: #10; Security Tinted: No.