Secure Installation with Hooks: Featuring 12 robust teardrop-shaped water bags, each with a hook for easy attachment. These pool cover weights securely fasten to your pool cover edges, preventing shifting and wind lift, ensuring the cover remains flat and free from debris and excess water. Freeze-Proof & Tear-: Crafted from superior thickened PVC, these pool cover weights are designed to withstand freezing temperatures and resist tears, punctures, and wear. This construction guarantees a long-lasting, leak-free performance even in the toughest winter conditions. Leak-Proof & Efficient Design: The teardrop shape of these water bags fits snugly against pool edges, while the sealed seams and a reliable leak-proof valve no water escapes. This design maintains consistent weight and stability, and allows for easy valve access for filling and draining. Easy Fill & Drain System: Equipped with a wide-mouth valve that connects seamlessly to most garden hoses for quick filling and draining. Remember to fill the bags only halfway to three-quarters full to allow for water expansion if freezing occurs, or alternatively, use sand for filling. Versatile Compatibility: These tarp weights are perfectly suited for any shape of above-ground pool covers, whether round, rectangular, oval, or custom-shaped. Adjust the number of bags used according to your pool size to effective wind protection and cover security throughout the year. Color: Blue Material: PVC Package Contents: 12* water bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.