Paper is fragile and susceptible to damage and deterioration, yet it holds some of our most treasured memories. You are the guardian of your family history and collectibles. Protect them with these archival-quality polyester envelopes from Gaylord Archival. They're a great choice for storing fragile materials such as broadsides, comic books, small maps, prints, photos, family records and documents. Polyester is sturdy, flexible and chemically inert, so it won't damage, discolor or adhere to contents. Commercially available items sold as "acid-free" actually begin to degrade within just a few years, but products that are truly archival quality provide protection that can last generations. Made in the USA. (Please note: Archival polyester's inherent static electricity helps to keep items from shifting in enclosures. For this reason, archival polyester should not come in contact with charcoal, pastels or other loose media.)