12 x 16 x 4 Expandable White Tyvek Envelopes 50/Case

These envelopes are crafted from 18 lb. olefin material. They're ten times tougher than regular paper envelopes. They can expand easily to accommodate bulky items. And they come with a convenient self - seal closure.

To use these envelopes, simply open the self - seal closure, place your bulky items inside, and then seal it shut. Make sure the items fit well without overstuffing to keep the envelope's shape. When it comes to storage, keep them in a dry place away from sharp objects that could tear the olefin material. If they get dirty, you can gently wipe them with a dry cloth. Avoid using water or harsh chemicals as they might damage the envelope.