A jute sack, or gunny sack, is a type of bag made of jute fabric, which is often used for storing grain, potatoes, and other items. Jute is a strong, durable fabric that is often used in sacks and bags because it can hold a large amount of weight. Jute sacks are usually made with a drawstring closure so that they can be easily closed and opened. Jute sacks are often used to store food items such as grains, potatoes, and other items. Jute is a strong, durable fabric that is often used in sacks and bags because it can hold a large amount of weight. Jute sacks are usually made with a drawstring closure so that they can be easily closed and opened. Jute sacks are also often used to store cat food and dog food.