This poly envelope with snap button is made of high-quality PP material, the poly envelope thickness is 18c, hard to fade, pretty protective; washable, reusable and durable, not easy to crack, solid edge. Translucent through sleek colored document folder keeps contents visible and makes finding documents so easy without opening your envelopes. Exquisite button design.Documents are not easy to slip out and are not easy to lose, can help protect your items from light spills and other moisture.