{
  "condition": "minecraft:entity_properties",
  "entity": "this",
  "predicate": {
    "equipment": {
      "offhand": {
        "items": "minecraft:shield"
      },
      "head": {
        "items": "minecraft:iron_helmet",
        "components": {
          "minecraft:unbreakable": {}
        }
      }
    }
  }
}
