Keep your pool cover secure this winter with the VEVOR Pool Cover Water Bags. This set includes 12 durable, 8-foot double chamber tubes made from 0.4mm thick PVC, ensuring they withstand the elements. Each bag features a leakproof screw cap, preventing any water loss and maintaining optimal weight. The vibrant blue color adds a touch of style while effectively keeping your inground swimming pool cover in place. Perfect for winter closing, these water bags are a must-have for any pool owner looking to protect their investment. Enjoy peace of mind knowing your pool is well-protected!