Swimming Pool Cover Hanging Bag with Hooks,Thick PVC Leakproof Pool Cover Weights Above Ground Pool Wall Bags,Winter Pool Tarp Weights for Above Ground Pool Cover [Pool Cover Weights Above Ground] Includes 16 heavy-duty PVC pool cover weights and 16 durable hooks for securely fastening winter pool covers, making it the ideal choice for closing your pool for the winter 【Durable and Freeze-Resistant Material】These pool cover hanging bags are made of upgraded thickened PVC material, which is waterproof, tear-resistant, wear-resistant and freeze-resistant, able to withstand harsh winter conditions and have a long service life.They are ideal for use when closing pools for the winter [Easy to Fill] The pool cover water bag adopts a wide mouth design, which can quickly fill and drain water, suitable for most garden water pipes and faucets. Note: The pool cover weights can only be filled to 3/4 full in winter to prevent frost heave and breakage. You can also choose to fill them with sand [Sealed Leak-Proof Design] This pool cover weights have good sealing and adopts a leak-proof valve design to ensure the weight and stability of the water bag 【Effective Wind Protection】Strong winter winds can easily lift pool covers. Using our pool cover hanging water bags can effectively prevent this, ensuring the pool cover remains securely in place