Pima cotton is a type of cotton grown primarily in the United State's Southwest. It is considered to be one of the superior blends of cotton, and is extremely durable and absorbent. Pima cotton is named after the Pima Native Americans who first cultivated the plant in the US, but its origins date back to its cultivation in Egypt.

Egyptian cotton is frequently used in towels and sheets. When woven it has long fibrous threads that means one can have a higher thread count within each piece of the fabric. In other words, a piece of Egyptian cotton has a much more extensive weave than other types of cotton. Towels made from Egyptian cotton are particularly desirable because they are very soft and help absorb water from the body quickly.

Since Egyptian cotton was so desirable, the US decided to try growing a type of it in the Southwest, which is a somewhat similar climate to Egypt. The resultant cotton was a mix of Egyptian and other types of cotton. Pima cotton is a little shorter than Egyptian cotton but still yields a thread that can be woven multiple times into a piece of fabric to create a dense, soft fabric.

Pima cotton may also be marketed by the name Supima®, which is patented. While some products may say they contain pima cotton, they do not have to contain all pima cotton. The Supima® sign on a product guarantees the fabric is made completely from pima cotton.

Pima cotton has applications in a wide variety of products. It is used in towels, sheets, and clothing. Pima cotton in clothing is most often used in shirts for both men and women. Companies like Eddie Bauer and Land’s End boast numerous products. Woven sweaters made with pima cotton are, as well, quite popular. They are light to wear, yet provide superior warmth.

Men’s socks can be made with pima cotton, but will often include some elastic to keep the socks up. Men often prefer these socks above others because of their softness and density. Additionally they tend not to wear out quickly.

One of the advantages of pima cotton is that the thickness of the cloth it weaves creates a very durable fabric. Those who market this cotton claim their products can last up to 50% longer than fabrics made from other forms of cotton. A disadvantage to pima cotton is that greater absorbency means stains are more readily formed. Some retailers who use pima in clothing now coat the cloth with an anti-stain guard.