CAT belongs to Caterpillar, a Fortune 500 multinational company in the world, and is one of the world's largest manufacturers of construction machinery, mining equipment, gas engines, industrial gas turbines and diesel engines. Originally designed for employees who operate equipment, CAT is known for its durability, comfort and safety, and has now grown into one of the world's best-selling casual footwear brands. CAT's shoes are tough, sturdy, practical, waterproof and slip-resistant, wear-resistant, and have heavy soles. It's not suitable for mountaineering, but it's still pretty cool for casual city wear. The classic overalls yellow boots Colorado have the reputation of "a machine worn under your feet" and are sought after by many young people.