Quality Material: They are very sturdy and can help umbrellas, tents, and awnings stay in place in strong winds. They are handmade. The bags are made of sturdier 600D Oxford fabric, well-structured, and sturdy. Each bag can hold up to 100 kg of weight in sand, stone, dirt, and any other contents you choose. Easy to Carry: They are easy to carry despite the weight once filled. They are also easy to empty and store when you are finished using it. Use Anywhere: You can use them anywhere you have a gazebo: Markets, camping, picnics, festivals, celebrations, sporting events or even at the beach. Specially Designed: The double Velcro closure system ensures that the weight bags stay securely attached to your Instant Canopy legs. And use the Velcro on the closed top, it is very easy to put on and take off.