Using these clip - in hair extensions is easy. First, brush your own hair to remove any tangles. Then, section your hair and clip the extensions onto your hair starting from the bottom. You can add as many extensions as you like to achieve your desired fullness. When it comes to maintenance, use a wide - tooth comb to gently detangle the extensions. Wash them with a mild shampoo and conditioner, and let them air - dry. Avoid using high - heat styling tools frequently as it can damage the hair. Also, store them properly when not in use to keep them in good condition.