5. 1 1 Tactical series is one of the products produced by Royal Robbins outdoor clothing manufacturer, which has been making outdoor clothing for more than 30 years. Royal Robbins 5. 1 1 Tactical series products are deeply loved by federal and state executive units in the United States. The most important thing is its simple and practical design, plus 100% cotton fabric, which is properly cut and sewn firmly, not too wide or too tight, and can still maintain sufficient durability under the conditions of possible violent operation and general cleaning.

5. 1 1 Tactical series was founded in 1968, which is famous for its durability, versatility and high quality. 5. 1 1 describes a climbing difficulty level in mountaineering. 5.0 is the simplest, 5. 10 is slightly difficult, 5. 1 1 is the most difficult, and 5. 1 1 is defined as follows: "After this difficulty, it's almost over.

5. 1 1 is the designated clothing of the special agent of the President of the United States, the Federal Bureau of Investigation of the United States, the police headquarters in Los Angeles, and the police departments in various cities in the United States.