Product details:

Our Gravipod 18 inch Round Umbrella weight bag is designed to add 85 lbs/38.5 kg. of ballast to provide that critical extra protection when conditions call for it. Simply install over the top of the umbrella stand post, fill with sand and you are ready to go. Rugged and dependable, our Gravipod weight bags are the perfect insurance to protect your umbrella and patio furniture. Soft and easy on the toes with no hard edges to kick. No rust, dings or dents. Gravipod - Portable gravity that holds your stuff to the planet, period!