One size fits all (youth or adult). Specially designed to visually recognize opposing teams in a black-lit arena; fluorescent orange for Droids, fluorescent yellow for Aliens. The Phazer Vest is one of the major components in the game using high tech, electronically engineered circuit design. Along with its unsurpassed quality construction, durability, and futuristic innovative design, it provides freedom of movement and protection for players while in play. A sleek collar design provides maximum protection on front and back neck areas, built-in impact sensors equipped with an FCC approved RF component to send signals to the scoreboard for every hit. Each vest has rechargeable batteries capable of playing up to 16 hours when fully charged. Quick charging feature allows maximum charge in less than 3 hours. The vest also has its own personal display counter that records the number of hits on the player and a game time counter.