How do different types of comic book bags (e.g., polypropylene, polyethylene, Mylar) compare in terms of protection and longevity?

How do different types of comic book bags (e.g., polypropylene, polyethylene, Mylar) compare in terms of protection and longevity?
Admin on May 25 2025 at 01:29 AM in Comic Book Supplies & Accs
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