With its inset panels and classic design, the Fairfield 20" x 20" x 20" Square White Self-Watering Polyethylene Planter is a timeless choice that will never go out of style. We use 100% high-grade Polyethylene resin in the manufacturing process. Double-wall design makes these planters sturdy, and provides the roots and potting mix with adequate insulation from surrounding weather conditions. This Fairfield Planter also comes with a built-in water reservoir that provides your plants with a consistent source of moisture.