VEVOR Pool Cover Water Bags, 5 Packs 8 Ft, Double Chamber Pool Cover Water Tubes with Reflective Strips, 0.3mm Thick PVC Bags Weights with Leakproof Screw Cap, for Winter Inground Swimming-Pool Covers

Enhanced Winter Pool Security: This 5-pack of 94.49 x 11.81 in pool cover water bags is designed to anchor your winter pool cover securely in place. Built with reflective strips on both ends, they offer added nighttime visibility for security. Once filled, they help weigh down the cover to keep out debris and wind-ideal for inground pools during harsh winter months. Flexible Fit for Irregular Pools: The pool cover water tube is soft and pliable design easily conforms to any pool shape-even custom or irregular layouts. This ensures full edge coverage and efficient setup without the hassle, making it a practical solution for both standard and specialty pools. Double-Chamber Anti-Roll Design: Each water bag for pool cover features a double-chamber structure for improved balance and stability. This design helps prevent rolling or shifting in high winds, so your pool cover stays flat and secure through storms or heavy gusts. Thick & Durable PVC Material: Crafted from reinforced 0.3 mm (TBC) flexible PVC, these winter pool cover water bags resist impact, sunlight, and minor abrasions. When filled, they create a reliable weight barrier that keeps your pool cover in place. For optimal performance, fill to 50-70% capacity to allow for expansion in freezing conditions. Leakproof Twist Cap: Equipped with a screw-on cap and rubber gasket, these pool cover weights water bags seal tightly to prevent leaks. The twist design is easy to use and more secure than snap caps, while the built-in retention ring keeps the cap attached. Tip: Slide the ring to the bottom of the threaded area before use for tight sealing.