A leave-in treatment is a hair product applied after washing and conditioning that remains in the hair until the next wash. Unlike traditional conditioners that are rinsed out, leave-in treatments provide ongoing nourishment, protection, and hydration throughout the day. These treatments are especially beneficial for dry, damaged, or frizzy hair.

Common types of leave-in treatments include:

Leave-in conditioners: Provide moisture and detangling benefits.

Hair serums: Often used for shine, smoothing, and frizz control.

Heat protectants: Shield hair from damage caused by styling tools.

Protein treatments: Strengthen and repair hair by adding protein.

Leave-in treatments are lightweight, non-greasy, and help maintain moisture, reduce breakage, and improve hair manageability. They are often applied on damp or towel-dried hair.