Features 1、[Windproof]They are very sturdy and can help umbrellas, tents, canopy stay up in strong winds. 2、[Easy to Use]Just place the bag around the umbrella post, secure it using a locking buckle, then fill the weight bag with sand. 3、[Easy to Carry]These are simple to carry despite the weight when filled. They are also easy to empty and store when finished using. 4、[High-quality]Made of high strength, waterproof, wearable, anti-tear 900D oxford cloth, the durable fabric offers more longer outdoor lifespan. 5、[Stackable]To achieve as much weight as you need, quick and easy simply fill the bag with sand, rock, or dirt and any available material nearby. Specification Description: The weight bags are made of sturdier material 900D oxford cloth, well structured, they are sturdy. With two comfortable handles, if you want to move, you can lift them together. You can use them anywhere you have a gazebo: Markets, Camping, Picnics, Festivals, Celebrations, Sports Events, or even at the beach. Fold-flat for easy storage when not in use. Features: [Windproof]They are very sturdy and can help umbrellas, tents, canopy stay up in strong winds. [Easy to Use]Just place the bag around the umbrella post, secure it using a locking buckle, then fill the weight bag with sand. [Easy to Carry]These are simple to carry despite the weight when filled. They are also easy to empty and store when finished using. [High-quality]Made of high strength, waterproof, wearable, anti-tear 900D oxford cloth, the durable fabric offers more longer outdoor lifespan. [Stackable]To achieve as much weight as you need, quick and easy simply fill the bag with sand, rock, or dirt and any available material nearby.   Specifications: Color: Black Material: 900D Oxford Cloth, PU Style: Practical Shape: Square Occasion: Outdoor, etc Item Size: 46*46*15cm / 18.11*18.11*5.9inch Hole Diameter: 3-3.5 Inch Package Size: 26*19*6cm / 10.23*7.48*2.36inch Package Weight: 400g / 0.88lb Package List: 1 * Weight Sand Bag (Not Including Sand) Package List 1 * Weight Sand Bag (Not Including Sand) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.