Remington's 32mm barrel Tong creates salon-worthy curls that last, and it’s all down to the intelligent OPTIheat technology found inside. The built-in, intelligent OPTIheat technology delivers heat to your hair where it’s needed most. It directs heat to the thicker top sections, and less heat to the tips of your hair. Finally, a 24-hour curled style to suit your 24/7 lifestyle can be yours.