Just before using a hair dryer, use a leave-in treatment to protect your hair from heat and friction from the brush. There are three main types: oil, milk, and cream. Unlike treatments that you use in the bath, these are called "leave-in" treatments. Choose the type that best suits your hair type.

The oil variety is mainly composed of moist oil. It applies a coating to each strand of hair, so it is recommended for those with high levels of damage or dry hair. It gives hair shine and firmness, while reducing the effects of damage and dryness. However, if you apply too much, it may result in stickiness or reduced volume, so use with care.

 
The milk type contains a balanced blend of moisturizers and oil. It imparts moderate moisture to the hair and leaves it with a smooth finish and little stickiness. It is an easy-to-use treatment for those with modest dryness or damage, or those with thin hair who want to add volume.

Like the milk type, the cream type contains oil and moisture, but is a treatment with a denser texture and contains more oil. Because of the increased oil content, it leaves your hair moist and manageable. It is suitable for those who want to moisturize their hair thoroughly.