This item is autokeep. This means that if you die with it, you will always keep it.
If the player dies below level 20 Wilderness, it will remain in the player's inventory. However, the item will be unusable and must be repaired with 30,000 coins by using the item on Perdu.
The void knight gloves can be upgraded into their superior variant by using a void knight armour patch on them, which can be purchased from a Void Knight for 200 Void Knight commendation points.