Use In The City: Don'T Worry No Sand In The City, Just Fill It Cyclic With Water To Keep Your Roof Top Tent Like Sandbags.Waterproof And Windproof : Easy To Use With A Simple Handle And A Screw Cap, Made Of Durable And Waterproof Pvc Material That Does Not Leak. Each Weight Bag Has A Convenient Velcro Closure, Hooks And Straps To Wrap The Leg Around Your Canopy To Withstand Strong Winds And Other Elements.Very Easy To Use And Carry/Carry: These Water Weights (Set Of 4 Bags) Can Hold Up To 10 Liters Of Water. The Weight Empties For Easy Storage And Saves 90% More Space. After Emptying (Only 6 X 6 X 5 Cm).User-Friendly Design: Velcro Fasteners Are Long Enough To Support Our 45 Corner Legs Suitable For Legs From 15 Mm To 50 Mm. You Can Adjust It As Far As You Want. Simply Fill In The Narrow Flag And Attach It To Your Awning For A Stable And Secure Setup. Many Uses Possible: Perfect For Kingkong, Luxury, Rhino, Awning And Beach Roofing.