Quality material: high strength 600D Oxford fabric with PVC for better waterproofing, durable and can be used in all types of weather conditions, and all seasons. Universal Fit: Caravan Awning Weight Bag, Instant Awning, E-Z Up Instant Shelter. (Fits leg size from 15mm to 50mm) weight from 15.9 to 18.1kg on each corner. Unique design: use gaskets, and there are two straps for the attach to the legs of your awning. Not only is it very sturdy, but it is easy to disassemble. And a strap on the top for easy carrying. Easy to use: Filled with sand, rocks, snow or any other material available nearby, emptying the bags was as easy as filling them. These filler materials are usually found outdoors. (Please note: sand not included) Product Features: Each bag consists of two pockets If you use sand, you will have nearly 30-40 lbs of weight on each corner of your awning. Size: 38cm x 33cm Easy to use and easy to carry. First, the top folds over twice to velcro in place, like a sandwich bag in brown paper that your parents gave you to take to school. Second, you fold the two lobes of the bag toward each other, compacting it into a solid piece. Then there is a velcro strap that wraps around the center of this piece horizontally. Finally, the velcro that hooks and the strap that goes down the back becomes a handle for carry bags. Product color: black Product size: 38x33 cm Quantity delivered: 4 pieces