Spider Silk cloak

Jewelry Cloak

Item Details

Utility 31.75
Bonus Level 19
Dyeable Yes
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Hit Points 7
Dexterity 15
Mentalism 4

Raw Item JSON

{
  "sell_value" : 20668,
  "sources" : {
    "monsters" : {
      "normal_drop" : [ "mantid easpag" ]
    }
  },
  "bonus_level" : 19,
  "flags" : {
    "dyable" : true,
    "emblemizable" : true
  },
  "icon" : 96,
  "utility" : 31.75,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Mentalism: 4 pts\n- Dexterity: 15 pts\n- Hits: 7 pts\n \n \n \nBonus Level: 19\n",
  "slot" : 6,
  "artifact" : false,
  "material" : 1,
  "name" : "Spider Silk cloak",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "dye_type" : 0,
  "id" : 21237,
  "category" : 5,
  "bonuses" : [ {
    "id" : 105,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 1,
    "type" : 1,
    "value" : 15
  }, {
    "type" : 4,
    "value" : 7
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?