The TRI Professional AeroGel Hair Finishing Spray is a styling product designed to provide a strong hold and a lightweight finish for hair. It typically comes in a 3 oz (ounce) size, making it convenient for travel and everyday use. This spray is known for its ability to keep hairstyles in place while allowing for natural movement and flexibility in the hair. If you're looking for a styling product that offers a firm hold without weighing your hair down, this could be a good option to consider.