The American brand "5.11 Tactical" was founded in the US state of California. Upon climber Royal Robbins reaching the top of a climb in Yosemite California, he noticed that the trousers that he was wearing were not suited for climbing. Robbins decided that he needed to design something more durable and with better functionality. Began manufacturing pants by the name of "5.11" in 1968.
The name "5.11" comes from the highest rock climbing difficulty level that was listed in the Yosemite Decimal System at Yosemite National Park, which was developed by Robbins in the 1950s.
In 2003, the brand acquired its current form. Now it focuses not only on climbers and outdoor, but also supplies its products to the FBI, the military, police, firefighters, rescuers, the Coast Guard, the Mountain Service and other services around the world.
The FBI has been working with the "5.11" brand since 1992, when it began using its pants to train its agents.More info