A temporary skill boost is anything caused by an item or action that temporarily raises a player's level in one or more skills. It allows the player to do things above their current level. For example, a magic potion, which boosts a player's Magic level by four, will let the player cast High Level Alchemy (which requires 55 Magic) with a Magic level of 51 to 55. Temporary boosts do not stack - for example, a dwarven stout provides +1 Mining and Smithing, and a mature dwarven stout provides +2 to the same skills; using them together will not produce +3, but +2, as that is the maximum boost.