Universal protective envelopes for Postcards/Postal Envelopes/Bills/Cards etc! Envelopes are made without the use of chemical acids or softeners that could in any way harm the exhibit. They are designed for various types of cards, postcards, envelopes, bills, tickets, etc. They are made of the highest quality materials and are extremely transparent so that you can see everything through the envelopes, and they will help protect your stored object from the effects of particles in the environment and also allow you to pick it up anytime you are on the road, thus preventing unwanted stains, moisture or other damage.