Etekcity 100 pcs Premium PM6 14.5&rdquo; x 19&rdquo; 14.5x19 Self-Sealing White Poly Mailers/Mailing Shipping Envelopes/Bags Pack of 100 14.5" x 19" poly mailing envelopes with water, tear and puncture resistant High-efficiency mailers are perfect for shipping a wide variety of non-fragile items The silver inner layer provides confidentiality Pressure sensitive adhesive provides a high strength durable closure, water and dirt resistant Thick poly material, durable yet with lightweight, saved you a bunch on shipping cost!