A blow dryer, also known as a hair dryer, is an electrical device used to dry and style hair. It works by blowing warm or hot air over wet hair, which speeds up the evaporation of water. Most blow dryers have adjustable heat and speed settings, allowing users to customize their drying experience. They often come with attachments like diffusers and concentrators to help achieve different hairstyles. Blow dryers are commonly used in homes and salons, making them essential tools for hair care. They can help reduce drying time and create various styles, from straight to curly. Proper use of a blow dryer can also minimize heat damage when combined with heat protectant products.