Poly Mailers 10x13" standard size premium designer printed shipping mail 25 - Pieces Our special polyethylene blend creates an extra strong, flexible and tear-resistant bag, while being super light, reducing shipping costs and being more environmentally friendly Free of strong plastic odors and easy to open, these bags are ideal for quickly shipping clothes, pants, jeans, leggings, T-shirts and many related items. The permanent and strong self-adhesive strip allows fast and safe packaging 100% non-transparent, the inside of our multilayer bags is made with a dark lining that prevents the contents of the bag from being seen during shipping