diff --git a/src/module/config.ts b/src/module/config.ts
index 777c6a6b..09bcfe5a 100644
--- a/src/module/config.ts
+++ b/src/module/config.ts
@@ -49,7 +49,7 @@ export const DS4 = {
      */
     armorTypes: {
         body: "DS4.ArmorTypeBody",
-        helment: "DS4.ArmorTypeHelmet",
+        helmet: "DS4.ArmorTypeHelmet",
         vambrace: "DS4.ArmorTypeVambrace",
         greaves: "DS4.ArmorTypeGreaves",
         vambraceGreaves: "DS4.ArmorTypeVambraceGreaves",
diff --git a/src/module/item/item-data.ts b/src/module/item/item-data.ts
index 7cdfd20b..fed78643 100644
--- a/src/module/item/item-data.ts
+++ b/src/module/item/item-data.ts
@@ -1,2 +1,38 @@
 // TODO: Actually add a type for data
-export type DS4ItemDataType = unknown;
+export type DS4ItemDataType = DS4Weapon | DS4Armor | DS4Shield | DS4Trinket | DS4Equipment;
+
+// types
+
+interface DS4Weapon extends DS4ItemBase, DS4ItemPhysical, DS4ItemEquipable {
+    attackType: "melee" | "ranged" | "meleeRanged";
+    weaponBonus: number;
+    opponentDefense: number;
+}
+
+interface DS4Armor extends DS4ItemBase, DS4ItemPhysical, DS4ItemEquipable, DS4ItemProtective {
+    armorMaterialType: "cloth" | "leather" | "chain" | "plate";
+    armorType: "body" | "helmet" | "vambrace" | "greaves" | "vambraceGreaves";
+}
+
+interface DS4Shield extends DS4ItemBase, DS4ItemPhysical, DS4ItemEquipable, DS4ItemProtective {}
+interface DS4Trinket extends DS4ItemBase, DS4ItemPhysical, DS4ItemEquipable {}
+interface DS4Equipment extends DS4ItemBase, DS4ItemPhysical {}
+
+// templates
+
+interface DS4ItemBase {
+    description: string;
+}
+interface DS4ItemPhysical {
+    quantity: number;
+    price: number;
+    availability: "hamlet" | "village" | "city" | "elves" | "dwarves" | "none";
+}
+
+interface DS4ItemEquipable {
+    equipped: boolean;
+}
+
+interface DS4ItemProtective {
+    armorValue: number;
+}
diff --git a/src/module/item/item-sheet.ts b/src/module/item/item-sheet.ts
index f6e95420..27fb6a92 100644
--- a/src/module/item/item-sheet.ts
+++ b/src/module/item/item-sheet.ts
@@ -54,16 +54,16 @@ export class DS4ItemSheet extends ItemSheet<DS4ItemDataType, DS4Item> {
 
         if (!this.options.editable) return;
 
-        html.find(".effect-create").click(this._onEffectCreate.bind(this));
+        html.find(".effect-create").on("click", this._onEffectCreate.bind(this));
 
-        html.find(".effect-edit").click((ev) => {
+        html.find(".effect-edit").on("click", (ev) => {
             const li = $(ev.currentTarget).parents(".effect");
             console.log(li.data("effectId"));
-            const effect = this.item["effects"].get(li.data("effectId")); // TODO: replace ["..."]
+            const effect = this.item["effects"].get(li.data("effectId")); //
             effect.sheet.render(true);
         });
 
-        html.find(".effect-delete").click(async (ev) => {
+        html.find(".effect-delete").on("click", async (ev) => {
             const li = $(ev.currentTarget).parents(".effect");
             await this.item.deleteEmbeddedEntity("ActiveEffect", li.data("effectId"));
         });
@@ -74,7 +74,7 @@ export class DS4ItemSheet extends ItemSheet<DS4ItemDataType, DS4Item> {
      * @param {Event} event   The originating click event
      * @private
      */
-    async _onEffectCreate(event: JQuery.ClickEvent): Promise<unknown> {
+    private async _onEffectCreate(event: JQuery.ClickEvent): Promise<unknown> {
         event.preventDefault();
 
         const label = `New Effect`;
diff --git a/src/template.json b/src/template.json
index 196d74a8..f81bd603 100644
--- a/src/template.json
+++ b/src/template.json
@@ -50,24 +50,24 @@
             },
             "equipable": {
                 "equipped": false
+            },
+            "protective": {
+                "armorValue": 0
             }
         },
         "weapon": {
             "templates": ["base", "physical", "equipable"],
             "attackType": "melee",
             "weaponBonus": 0,
-            "opponentDefense": 0,
-            "properties": {}
+            "opponentDefense": 0
         },
         "armor": {
-            "templates": ["base", "physical", "equipable"],
+            "templates": ["base", "physical", "equipable", "protective"],
             "armorMaterialType": "cloth",
-            "armorType": "body",
-            "armorValue": 0
+            "armorType": "body"
         },
         "shield": {
-            "templates": ["base", "physical", "equipable"],
-            "armorValue": 0
+            "templates": ["base", "physical", "equipable", "protective"]
         },
         "trinket": {
             "templates": ["base", "physical", "equipable"]