1. HIGH QUALITY MATERIAL The IBC cover is made of high quality 210D Oxford polyester fabric, which is waterproof, weatherproof, dustproof, UV resistant and tear resistant to protect IBC water tanks from sunlight, rain, snow, dust and foliage and ensure a longer life. 2. WIDE COMPATIBILITY The IBC water tank cover measures 39.4 x 47.2 x 45.7 inches / 100 x 120 x 116 cm, suitable for 1000 litre water tanks or rainwater tanks, perfect for patio, garden or lawn. Please measure the tank size to ensure a correct fit before purchase. 3. DETAILED DESIGN The top of the lid has a square opening design with Velcro. When collecting rainwater, open the square Velcro on the top of the lid and the lid of the cistern comes out. You don't need to remove the lid. The bottom drawstring design can securely attach the lid to the IBC water tank. 4. PROTECTIVE The sturdy lid with neatly stitched seams protects your cistern from bad weather in the long term. After 1500 hours of standing water, there is no leak in the cistern. It also drastically reduces algae growth in the cistern and maintains the clarity of the water.