"Hair sun protect" (noun) refers to products and practices that protect hair from the sun's damaging UV rays. These can include hats, scarves, hairsprays with UV filters, and special shampoos and conditioners.
Hair sun protection is crucial as UV rays can cause hair to become dry, brittle, and discolored. In severe cases, sun damage can lead to hair loss. One key historical development in the field of hair sun protect is the introduction of UV-absorbing hairsprays in the 1980s.