durable material: high quality fabrics (600D oxford with a pvc coating) strong and sturdy, won't crack or tear, can't be corrosion, sunscreen waterproof, heat resistant, heat resistance cold, frost and easy to clean. Specially designed for: 2 detachable pieces of ergonomics and weight base are durable, easy to set up and carry, can be folded and stored when not in use. large load prevent them from tipping over. Each piece of this sandbag umbrella can hold up to 50kg of sand when fully filled, preventing your umbrella from tipping over and your family from hurting even when it's very windy and very windy. easy to create: the weight umbrella is easy to fill this sandbag, the opening is wide and allows you to quickly fill the bag, put the bag around a composite pole please note: "sand not include".