1) In medieval armour this was a light helmet or head-piece, with an outward curve at the back.
1438 unum salett, York
1476 De ijs iiijd de precio j salett cum visura capto pro libertate Firthbank, York
1504 every inhabitant within his ward to have a staffe and a salet, York
1526 To Thomas Milner my salett and a pare of white hoise, Halifax.