Nowadays, cats who live indoors are safer than their outside cousins, but they often become bored and gain weight. There are however ways to avoid it. Vertical territory with perches at different heights inspires cats to jump, climb and leap and then to ideally rest up high so they can keep a watchful eye on their human companions and survey their kingdom from a high vantage point.
Our CHILL cat shelves give the cat a better vantage point. From that location, the cat can survey his 'realm' and be more aware of activities of people and other pets. If a cat is anxious or afraid, it may get him farther away from the cause of his anxieties (e.g.; pesky dog or small children).