10 x 13 White Flat Tyvek Envelopes 100/Case

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

Using these envelopes is a breeze. Just open the self - seal closure, put your items inside, and press the seal to close. When choosing an envelope, you can pick the plain one for a simple look or the one with First Class printed borders for a more official feel. As for maintenance, keep them in a dry place to avoid any damage. Be careful not to overstuff them as it might affect the seal. Also, make sure the items you put inside are clean to prevent soiling the envelope.