5.11 Tactical

5.11 Tactical (pronounced 'five eleven tactical') is an Irvine, California-based brand of clothing consisting of uniforms and tactical equipment for military, law enforcement and public safety personnel. The company also operates a chain of retail stores, with 13 locations as of January 2017. 
5.11 Tactical started in Modesto, California as a clothing line created by mountain climber Royal Robbins. Upon 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. He owned a boot and clothing company and began manufacturing pants by the name of "5.11" that had a trademarked tactical strap and slash pocket design in 1968.
5.11 Tactical makes clothing, gloves, boots, holsters, knives, slings and packs for law enforcement use, but is popular with civilian shooters and private military contractors.