1. Improved style: Add a drawstring to enhance the protective function, so you don't have to worry about the wind. The 600L tank cover is made of 420D polyester. The protective cover is also durable and corrosion-resistant. 2. Protective function: Our 600L tank cover can protect your outdoor IBC storage tank from harmful UV rays and antifreeze, and extend the service life of your IBC storage tank. 3. Convenience: Thanks to the recess and tarpaulin, you can use the IBC tank without removing the lid. 4. No algae formation: With the 600L tank cover, the formation of algae in the storage tank is largely avoided, which can protect the IBC storage tank and its contents. Size: suitable for 600L water tank (approx. 120 x 80 x 100cm)