Pima cotton is a type of extra-long staple cotton (ELS) and is one of the highest grades of cotton in the world, ranked right behind Egyptian cotton. It is grown in select areas of the southwestern United States where the cotton is fully irrigated and benefits from a longer growing season in a hot, dry climate. Pima cotton has long threads similar to Egyptian cotton and can be woven into a soft dense fabric. One of the advantages of Pima cotton is that the thickness of the cloth it weaves creates a very durable fabric. Due to its strength, softness, durability and absorbency, it is primarily used for sheets, towels, and clothing.