10 x 13 x 1 1/2 White Expandable Ship-Lite Envelopes 100/Case

These envelopes are crafted from white paper strengthened with mesh screen poly fibers. They're moisture-resistant, making them ideal for shipping. Their expandable design is perfect for books and other bulky items. Plus, they feature a convenient self-seal closure.

Using these envelopes is easy. Just open the self - seal closure, put your items like books or other bulky things inside, and then seal it shut. Make sure not to overstuff the envelope as it might affect the expandable structure. To maintain these envelopes, keep them in a dry place. Since they are moisture - resistant, they can handle a bit of dampness, but it's best to avoid long - term exposure to wet conditions.