The perfect foundation for extreme weather and sports is developed by Under Armour, which makes clothes and workout equipment used by civilians, military, and law enforcement personnel around the world. Trusted for their reliable quality standards, their tactical clothing became popular with SWAT teams in the United States, which has furthered their acknowledgment by professional users around the entire world. Known since its founding in 1996, this American brand has been developing thermal underwear for sporting and extreme conditions, gaining popularity across the globe.