Hair Straightening RebondingHair straightening is a hair styling technique which involves the flattening and straightening of hair in order to give it a smooth, streamlined and 'sleek' appearance. Hair straightening may be just the treatment for you! Straight hair has always been in style and it is little wonder that there are many a hair straightening products and treatments enticing women today. Hair pressing and straightening methods have been around since the turn of the 20th century.