10 x 13 x 1 1/2 Expandable White Tyvek Envelopes 100/Case

These envelopes are made from 18 lb. olefin, which makes them ten times stronger than regular paper envelopes. They can expand to hold bulky items easily. Plus, they feature a convenient self - seal closure.

To use these envelopes, simply open the self - seal closure. You can put bulky items inside as they are expandable. When closing, press the self - seal flap firmly to ensure it stays shut. Keep these envelopes in a dry place to maintain their strength. Avoid sharp objects that could tear the Tyvek material. If they get dirty, you can gently wipe them with a dry cloth.