These are a steal at around $10-15 USD, depending on the size you want and how thick the material is. In the winter, they're heavier and in the summer, they're lighter.
There are many different colors and sizes.
This was just a thought that I had this morning on my way to work, so I haven't REALLY done much research, but if you guys are interested, I will look around and shop around for interesting things, LOL. Thanks for replying all!!