50ea - 20 X 27 Kraft Self-Seal Stayflats Mailers - Keep your documents flat during shipping with self-adhesive Stayflats mailing envelopes in kraft. These envelopes feature a sturdy center-seam construction, pressure sensitive closure with perforated score marks, and tear strip opening. Designed with maximum rigidity in mind, these envelopes are an ideal easy packaging solution for e-commerce businesses. Perfect for photographs, certificates, and other sensitive documentation. Kraft Self Seal Non-Bendable Mailers are made of 100% Recycled Paperboard with a minimum 35% Post Consumer Content. They are 100% recyclable.