Which product is commonly used to soften hair prior to a haircut?

Hair conditioner is commonly used to soften hair prior to a haircut because it is specifically formulated to penetrate the hair shaft, providing moisture and nourishment. This increased moisture helps to relax the hair's structure, making it smoother and more manageable. When hair is conditioned properly, it is less likely to tangle or break during the cutting process, leading to a cleaner and more precise haircut.

In contrast, other products like hair gel are typically used for styling and may stiffen the hair rather than soften it. Leave-in serum is designed to provide shine and manageability but often lacks the deep conditioning properties that prepare hair for cutting. Moisturizing spray can help hydrate hair but may not have the same efficacy as a dedicated conditioner in providing thorough softness and smoothness necessary for an optimal haircut.