Canopies can come in a variety of forms and can be made from various materials depending on the exact use that is required. They are idea for helping to create an additional shelter to protect you from the weather and they can also be relatively inexpensive to purchase.
Most canopies are going to be made from either a thick fabric which is treated to be waterproof or a form of polythene. Obviously there are going to be changes in the price depending on the quality of the one that you buy.
The canopies can be used in a number of locations from being attached to an existing building to give some temporary form of shade to being a complete pop up unit used by advertising people as some form of stall. They often have poles to create the framework with the canopies stretched over this shell to give the overall look.
The canopy poles help to give it stability as some of them can be quite flimsy meaning they can be easily damaged in the wrong conditions. However the relatively easy structure does mean they can be constructed in a very short space of time making them very adaptable.
If you are buying a canopy then check what is known as the denier of the fabric used. The higher the number the denser the fabric and it is therefore going to be much stronger and more resistant to the weather. Obviously this is going to be reflected in the cost of the canopy tent.
So overall canopies come in different materials, sizes, and uses. They are temporary structures that can be quickly assembled and can become a shelter or used for other purposes for groups or businesses. What you pay for one can alter the size of the canopy along with the quality as you really do get what pay for in regards to this.