Cotton is a soft fibre that grows around the seeds of the cotton plant, which is grown between latitudes 45 degrees north and 35 degrees south. In tropical climates cotton is a perennial crop. Typical untreated cotton has a matt lustre, soft and smooth touch. Cotton garments have a good level of moisture absorption. Dyed cotton retains its colour longer if washed in warm or cool water. Mercerized cotton is a treatment applied to the cotton to give it a more lustrous and smoother appearance