10 x 13 White Flat Tyvek Envelopes - Side Loading 100/Case

These envelopes are made from 14 lb. olefin, making them ten times stronger than regular paper envelopes. They feature a self-seal closure for easy use. You can choose between plain ones and those with First Class printed borders.

These envelopes are really easy to use. Just open the self - seal closure, put your items inside, and then seal it shut. When using them, make sure the items you're putting in fit the 10 x 13 size. If you're using the ones with printed borders, be careful not to smudge the print. For maintenance, keep them in a dry place to avoid any damage to the material. They're quite durable, but try not to expose them to sharp objects that could tear the olefin material.