Our protein straightening cream contains polyquaternium-7 polydimethylsiloxane. It can provide long-term hair straightening effects reduce daily management time strengthen hair structure and reduce the risk of heat damage. Its use method is very simple: clean and dry hair take an appropriate amount of hair oil evenly apply to the hair then comb the hair straight wait 10-30 minutes wash the hair with water. And it can keep the hair corrected for a long time and maintain the straight hair effect.