PopShield protectors are simply the best way to protect your 4-inch vinyl collectibles. Made with .45mm thick acid-free PET, PopShield protectors are extra thick and sturdy for maximum protection during shipping and long-term storage. Features include an extra thick .45 mm acid-free PET plastic, an average of 10-25% thicker than most other protectors on the market. Thicker plastic means better protection for your collectibles! The easy-peel protective film keeps the PopShield from getting scratched before it gets to you. The push-lock tab that adds structural integrity to the box when formed, and keeps your 4-inch vinyl collectibles inside no matter what happens.