Functional military clothing should first and foremost be resistant to abrasion and tearing and made of materials that can withstand extreme use. Also key are camouflage and thermoregulation properties, so that it provides thermal comfort over a wide temperature range and effective camouflage. In addition, it must offer practical solutions, such as numerous pockets, reinforcements in key areas and a customizable fit. Brands that produce military clothing include Helikon, M-Tac, Maskpol and Mil-Tec.