If your parasol cross base cannot live up to your standard, then this water-and-sand-filled parasol base is what you need. The wide and flat boxes spread the weight under the pole and ensure the sturdiness of the parasol by increasing its bottom weight with water and sand. You can adjust the amount according to your needs. It is in this way can it achieve optimal firmness. Our base is perfect as an umbrella base, no matter judging from its function or quality. /Maintenance tips: 1. It is best to use a soft sponge and a gentle cleaning solution made up of mild detergent and water. 2. Gentle scrubbing can clean out the dust on it.