The turban is not one of the five Ks — the kesh, uncut hair, is; the dastar is what covers it — and Sikhs make the distinction because it matters legally as well as theologically. It is tied fresh every morning from five to seven metres of cloth, and the style is legible: the pointed Kenyan or Nairobi style from the East African Sikh diaspora, the round Patiala shahi worn at weddings, the Nihang's dumalla with a steel quoit set in it, the boy's patka. Women are not required to wear one and an increasing number of amritdhari women do, which is contested inside families more than inside doctrine. The dastar is also the most exposed part of Sikh life in the West: it has produced court cases about motorcycle helmets, hard hats, army uniforms, French schools since 2004 and airport secondary screening, and it is the reason Sikhs are killed in reprisal attacks after events involving people they have nothing to do with. That is why Sikh organisations spend so much of their budget on public identification campaigns.