The durable and attractive AeroQuick compost bins feature 5mm plastic wall panels for maximum strength. Its uniquely designed wall panels are not only strong, but also allows air to continuously flow upwards along all 4 side panels. This ensures the transport of oxygen into the compost, and moisture out of the compost. Additionally, the lid of the composter is attached via hinge and locks to keep out unwanted pests. A must have composter!