The red slayer helmet is a piece of equipment that is worn in the helmet slot. It is a cosmetic upgrade to the slayer helmet.
It can be created by adding an unstuffed abyssal demon head after purchasing the ability Unholy helmet for 1,000 Slayer reward points from any Slayer master. This is reversable, and the head will be returned to the inventory along with the slayer helmet’s components. The abyssal demon head will be lost on death in PVP.