This eco-bag is made of cotton fabric, a traditional type of eco-bag called an "azuma bag." Because it's made of cloth, it doesn't make a rustling sound, making it perfect for carrying lunches or shoes. If you keep it in your bag, you can use it when you buy lunch at a convenience store, and you can even use it as a hand towel by folding it up. It's sewn so that the edges fit together perfectly. I've priced it accordingly. - Cotton fabric Thank you for looking.