What are comic book loaders? Also known as top loaders or toploaders, these are rigid plastic sleeves with an open top. They add an extra layer of security and protection to your comic books after you sleeve and board them.
After you put a comic book in an acid-free Mylar sleeve with a backing board, you then put it in a top loader. These are just extra steps you can take to protect each individual comic book you own without grading or slabbing them.
