Pineapple & Watermelon Poly Mailer’s 10x13 Pack of 25 USPS Approved Fedex Approved UPS Approved 10x13" Standard Size Premium Designer Printed Shipping Mailers. Our Special Blend of Polyethylene Creates an Extra Strong, Flexible, and Tear Resistant Bag, While Being Super Light Weight, Reducing Shipping Costs, and Being more Eco Friendly. Free of Strong Plastic Odors and Easy-to-Open Make These Bags Ideal for Quickly Shipping Clothing, Pants, Jeans, Leggings, T-Shirts, and Many Related Items. Permanent & Strong Self Adhesive Strip Allows for Quick & Secure Packaging. 100% Non-See Through, The Interior of our Multi-Layer Bags are Made with a Dark Lining Preventing the Contents of the Bag from Being Seen During Shipping. 100% recyclable!