Players wear tactical clothing and accessories not only for the added realism, but to fulfill the practical needs similar to that of a real soldier. Such as being able to carry spare magazines, water, food or other equipment in specified vests. The most common are holsters, load bearing vests, and modular rigs such as MOLLE, ALICE, and the British PLCE systems. Some players even wear military-style helmets, such as the kevlar MICH 2000 or PASGT helmet, or hydration systems, such as those manufactured by Camelbak.