[Quality Material]:They are very sturdy and can help umbrellas,tent,canopy stay up in strong winds. they are made by hand sewing. The bags are made of sturdier material oxford cloth, well structured, they are sturdy, each bag having the ability to hold up to 25-36 lbs of weight in sand, rock, dirt and any other contents of choice. [simple to carry]:These are simple to carry despite the weight when filled. They are also easy to empty and store when finished using. [Use Anywhere]: You can use them anywhere you have a gazebo: Markets, Camping, Picnics, Festivals, Celebrations, Sports Events, or even at the beach. [Specially designed]: Double velcro lock system will ensure the weight bags stay securely attached to your Instant Canopy legs. And use the velcro top closed, its very easy to put up and release.Products from NIUNIU's store