How do different types of comic book bags, such as polypropylene, polyethylene, and Mylar, compare in terms of protection and longevity?

How do different types of comic book bags, such as polypropylene, polyethylene, and Mylar, compare in terms of protection and longevity?
Admin on August 20 2025 at 05:15 PM in Comic Book Supplies & Accs
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