Root volume spray gives hair more hold and elasticity at the roots. Product feature: Flex 6 / Hold 6. What are Flex and Hold? With the Flex and Hold factors, you can easily style your hairstyle to suit your type. A Flex factor less than 5 means that the hair has a strong hold after applying the product. A Flex factor greater than 5 allows for easy adjustments to the styling even after the product has been applied. A Hold factor less than 5 indicates a lower hold and thus greater flexibility in styling. A Hold factor greater than 5 means a stronger hold and less flexibility in the hairstyle. Application: Spray the product close to the roots on towel-dried hair.