To style heat friendly or Tru2life fibers, you must make sure that your heat tool you will be using is on the correct temperature. Usually the maximum temperature they should be at is 350 degrees Fahrenheit. If your heat tool does not have a temperature gauge, we recommend putting your settings on medium to low. To curl your hair, take 1" sections and curl around the barrel. Then slowly slide the fiber off the curling iron and pin the curl together. Once the fiber is cool to the touch remove the pin. To straighten, just simply slide the flat iron, slowly down 1" sections starting from the root to the tip.