15 x 20 White Flat Tyvek Envelopes 100/Case

These envelopes are made from 14 lb. olefin material. They're ten times tougher than regular paper envelopes, offering excellent durability. They come with a self - seal closure for easy use. You can choose between plain designs or ones with First Class printed borders.

Using these envelopes is super easy. Just open the self - seal closure, put your items inside, and press the seal to close. When using them, make sure not to overstuff as it might affect the seal. For maintenance, keep them in a dry place to prevent any damage to the material. They're very durable but still handle them with care to get the most out of them.