From Avocado Hills: Slangbot is an urban dictionary for your iPhone, iPod Touch and iPad.
Pima cotton, also called extra long staple (ELS), is a type of cotton grown primarily in Peru, the southwestern United States and Australia. It is considered to be one of the superior blends of cotton and is extremely durable and absorbent.
Upland cotton being the most common type in the U.S. has a staple length (length of fiber) of 13/16 to 1  inches. The American Pima has a staple length of 1 5/16 to 1  inches. These plant types grow and mature at different rates and lengths of time, but basically mature within a 30 day period of each other.