Product details:

Quality Park Self-Seal Envelopes provide excellent protection when you want to package and mail bulky paperwork. This item features standard, one-side or top loading that can be addressed in either orientation. A convenient Flap-Stik closure creates a firm seal. Ideal as a lightweight alternative to a rigid box, the Dupont Tyvek envelope will not rip, tear or puncture, and it is much stronger than traditional paper envelopes. This product resists exposure to water and other liquids. Simply peel, seal and mail. One box contains 100 envelopes.