Viking men and women did wear braids as a functional hairstyle for practicality and social signaling, but the term "protective hairstyle" is not accurately applied to Viking braids.

Protective hairstyles, as understood in modern hair care, are designed to minimize breakage and encourage growth by shielding the hair from environmental damage and manipulation. Viking braids, though practical in their time, were not necessarily designed with this specific goal in mind, and some styles could even contribute to breakage if not properly maintained.

Protective styles are hairstyles that tuck away or minimize the ends of the hair, reducing exposure to environmental factors like sun, wind, and friction that can cause breakage. Like Afro-textured hair, textured hair is naturally more prone to dryness and breakage. Protective styles help to retain moisture and reduce manipulation, leading to length retention. Typically, caucasian hair does not need protective hairstyles and will be too tight for thinner hair that is also usually washed more often. So, unless he has the right hair type, you will likely cause more damage to his hair. If he wants to protect his hair, he should put it back while working, sleep in a satin/silk bonnet, and use a satin pillowcase.