Made of 600D oxford cloth, strong tear-resistant and wear-resistant. Designed for holding your tent, umbrella and other outdoor furniture be secured in place. Features: Set of 4 weight bags, each bag weight capacity is about 25-30 lbs. Can be filled with sand, pebbles, rags or any available material near by. Strong adhesive fastener tape ensures the bag attaches the frame closely and firmly. Quick and easy to fill with the large opening. Made from high density 600D Oxford cloth which is durable, water resistant, and tear resistant. Improved cross stitching seams reinforce the stability and sturdiness. Nice for stabilizing any instant canopy, pop up canopy or folding gazebo structures. Specifications: Material: 600D Oxford cloth Color: Black Unit Length: 50 cm / 19.7 in Package Size: 25 * 25 * 3 cm / 9.8 * 9.8 * 1.2 in Package Weight: 450 g / 15.9 oz Package List: 4 * Sand Bags Note: Bag only, filler is not included.