Air-Tite holders are made from an acrylic plastic with a non-yellowing agent to ensure the crystal clear display of your coins for any length of time. All materials used in the production of the holders are totally inert and PVC free. The Direct Fit holders are designed to securely hold and display your mint condition coins without a ring. Coins in less than mint condition might rattle around due to wear and should be held in a ring holder for secure storage.