Luis Bien Hair Fiber Thickener Spray is a hair product designed to add thickness and volume to your hair, especially in areas where your hair may be thinning or lacking fullness. Here's how it generally works:

Hair Fiber Technology: This product typically contains tiny, micro-sized hair fibers that are designed to cling to your existing hair strands. These fibers are often made from materials like keratin or cotton, and they have a texture similar to real hair.

Application: To use Luis Bien Hair Fiber Thickener Spray, you would typically apply it to your dry hair. Hold the bottle a few inches away from your head and spray it onto the areas where you want to add thickness or cover up thinning spots. The fibers will adhere to your natural hair, making it look thicker and more voluminous.

Styling: After applying the product, you can style your hair as desired. You can use a comb or your fingers to distribute the fibers evenly and create a natural look.

Hold and Finish: Some hair fiber thickener sprays also provide a light hold to help your styled hair maintain its shape throughout the day.

These products are a cosmetic solution and offer a temporary improvement in the appearance of hair thickness and volume. They can be particularly helpful for individuals dealing with hair thinning or balding, as they provide a quick and easy way to make the hair look fuller.

It's essential to follow the instructions on the product label for the best results. Additionally, remember that these products are not a long-term solution to hair loss or thinning, and they wash out with regular shampooing. If you have concerns about hair loss, it's advisable to consult with a healthcare professional or dermatologist to explore potential underlying causes and treatment options.