Hair fibers made with keratin help cover up hair loss, as they stick to the existing hair and create an improved fuller hair look. To make sure that hair fibers last long, Toppik's Fiber Hold Spray can provide you with the required assistance. Fiber Hold Spray has a fine texture similar to a mist. It increases the adherence bond between existing hair and hair building fibers. Improved adherence provides added security to your hair and a natural appearance. With use of Fiber Hold Spray, hair fibers last longer and thin hair instantly appear thick and full.