Black fine mesh rain barrel net cover that blocks light to help reduce evaporation from the rain butt and keeps debris out of the water. Material and construction: made of quality polyester, tearresistant for longterm use. The net is dense and thin and can effectively prevent small items from falling into the barrel. Easy to install: simply place the net cover on the water butt and fix it with the drawstring. Adjustable drawstring design: cords allow easy and convenient use; tighten the cord to prevent the cover from being blown away by strong winds. Key attributes: color black; material polyester; mesh is dense and thin to balance protection with water flow. Use scenarios: Garden or yard rain barrels during dry spells: reduce evaporation while keeping leaves and other debris out. Outdoor irrigation setups in windy locations: secure with the drawstring to prevent displacement. Greenhouse or patio rain barrels: block light to help maintain water quality and simplicity of upkeep.