Tresemme Heat Protect Styling Spray 300ml You should always protect your hair when you expose your hair to heat. This product guards against heat styling tools up to 230 degrees celcius, keeping your hair shiny & incredibly soft. Professional quality formula contains a heat activated complex to help protect your hair during heat styling, whilst smoothing frizz & sealing in shine. Spray liberally 6-8 inches away from mid-shaft to ends. Use a brush to pull hair straight & blow dry from roots to ends. Use both on damp hair before you blow-dry & on dry hair before curling or using straightening irons to shield hair from damaging heat.