A light mystic hat is mid-level magic armour that requires 50 Defence to wear. It is part of the mystic robes set and comes in two other colours: blue and dark. It cannot be crafted from mystic cloth unlike the standard blue variant, and is only available as a drop from wall beasts or basilisks.
When Item lending was updated there used to be a bug when a player is lending out a Mystic hat to another player. The hat would disappear when the other player logs out (supposing they have "Until Log-out" selected), leaving the other player bald. This has been fixed.[source needed]