What statement is true regarding leave-in conditioners?

Leave-in conditioners are specifically designed to be used without rinsing, allowing them to provide ongoing moisture and protection to the hair throughout the day. The formulation of these products typically prioritizes lightweight ingredients that do not weigh down the hair. This is particularly beneficial for maintaining volume and preventing the hair from feeling heavy or greasy, which can often be a concern with heavier, rinse-out conditioners.

The claim that they are high in molecular weight is misleading; indeed, many leave-in conditioners utilize smaller molecules to allow deeper penetration into the hair shaft and enhance moisture retention without adding bulk. Application specifics, such as whether they should be used on wet or dry hair, can vary by product; however, many manufacturers recommend applying to damp hair for optimal results.