Durable PE material The rain barrel cover is made from high quality PE material, offering corrosion resistance, non-toxicity, odorlessness, and environmental friendliness. It is strong and durable enough to withstand sun and rain outdoors for long-term use. Adjustable drawstring closure The edge features a drawstring cord that makes it easy to close the rain barrel. The adjustable drawstring allows a snug fit and can connect to water butts with smaller diameters for a secure seal. Black fine net The net is black to effectively block light and reduce water evaporation. Its fine, dense mesh filters out contaminants such as dirt, small stones, and dust, helping keep the water cleaner. Mosquito and insect protection This cover helps prevent mosquitoes from entering the rain barrel to lay eggs and hatch, and also blocks other insects, keeping the water and barrel cleaner. 2-3 use scenarios - Garden use: install on a rain barrel to collect rainwater for lawn and flower bed irrigation, while reducing evaporation and debris entry. - Patio or balcony use: fits varying butt diameters with the drawstring; protects small outdoor water butts from insects and sediment. - Greenhouse or small farm: guards water supplies used for irrigation, maintaining cleaner water and reducing mosquito breeding. This cover stays consistent with the product’s materials, compatibility, size-adjustability, and performance.