The first step to caring for your hair is to keep it clean and healthy, and conditioner is an essential part of that equation. There are two common types of conditioners: those you rinse out after applying in the shower and leave-in conditioners, which are typically used for styling purposes. These can also be used in tandem. Conditioners are designed to restore end-to-end moisture to your hair and provide ingredients that will help with detangling, balancing and either calming or adding body to your luscious locks. Some contain sunscreen to protect your delicate scalp from the UV rays of the sun.