in one layer of armor and prevents enemy attacks from "splatting" the player. If the player takes enough damage that would otherwise splat them, a layer of armor breaks while the player is restored to full health and given a short period of invulnerability. Unlike most defensive power-ups, the player can have multiple layers of armor at once. Evasive abilities Some power-ups consist of items which help the player avoid or escape enemies or enemy weapons. This category includes "speed boosts" and other power-ups which affect time, which can be temporary, permanent, or cumulative, and "invisibility" power-ups which help the player avoid enemies. Rainbow Islands: The shoe power-up, which makes the player character move more quickly. R-Type: The 'S' icon, which increases the player's speed every time one is collected. Unreal Tournament, Quake I & II: The Invisibility power-up, which turns the player into an indistinct wireframe or shadow. Similarly, radiation suits serve to deflect certain types of weapons as well. Crisis Core: Final Fantasy VII: The Dash materia, which allows Zack to move at double speed to help avoid enemy attacks. Jak and Daxter: The Blue Eco, which enables Jak to run faster and jump higher. It is also used to activate the ancient Precursor machinery found throughout the world, opening doors and activating floating platforms. Due to this, Blue Eco can also be considered an Access ability (see section below.) Sonic the Hedgehog: The Power Sneakers/Speed Shoes item in this series temporarily increases the speed, accelerations and jump height of the player character. Super Metroid: The Speed Booster is a permanent power-up that gives Samus Aran the ability to run incredibly fast, destroying any enemy in her path. She can also perform a technique with the Speed Booster called the "Shinespark", which allows her to do an invincible charge in 6 possible directions, at the cost of draining health. Access abilities Some power-ups help the player enter new or previously inaccessible areas, or "warp" to another level. Access abilities, depending on the game, can be required to progress normally or be entirely optional. Examples: Super Mario Bros. 3: The warp whistle, which allows player to first go to a warp zone, then advance to another world of a higher value, and the hammer, which allows players to take shortcuts on the overworld game map. Mario also acquires a Raccoon Leaf which allows him to fly, sometimes to hidden