Bosmere 48" Pre-Formed Replacement Coco Liner with Soil Moist for Window Basket Soil moist mat works like a sponge and wil hold up to 32 oz of water 100% natural, made from renewable resources Pre-formed to fit a 48" long window basket The water is gradually released into the basket as the soil dries out The mat will re-absorb water when the basket is watered; Compostable at end of season A rugged, non-collapsible, tear resistant and long lasting garden bag Soil Moist mat soaks up excess moisture and then releases into the soil as the soil dries out resulting in healthier plants and better blooms 100-percent natural; Made from renewable resources Pre-formed to fit a 48-Inch long window basket