Perfect for patio, beach, offset, cantilever, swing pool and other outdoor umbrellas. High-strength 900D Oxford Cloth with PVC, waterproofing, durable and can be used in all types of weather of 4 seasons." Heavy loads prevent tipping] Each of these umbrella-shaped sandbags can hold up to 50 pounds of sand preventing your umbrella from tipping even in strong winds and gusts. Our square weight bag design complements the shape of your square umbrella stand, all while adding the extra weight needed to keep your umbrella where it should be. Suitable for: the balcony, beaches, grassland, garden, the top of the hill, the lake. Product color: black Product size: 46 x 46 x 15cm Delivery Quantity: 1 Piece