With its inset panels and classic design the Fairfield 20 x 20 x 20 Square Black 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.