Author here. That is a great point. My own case is such that I wash each shirt (button down shirt) and underwear shirt after every use. I have to. I guess my fa

Author here. That is a great point. My own case is such that I wash each shirt (button down shirt) and underwear shirt after every use. I have to. I guess my fast metabolism contributes. I tumble dry the underwear shirts but not the shirts. Washing certainly takes its toll. In my case, wear shows both "technically", as the fabric and details weakening, but also as a general decline in freshness. And i don't mean fresh-as-new, but rather pure whites turning yellowish. They become unfit for my work context. Some of this wear is from washing, some is from deterioration during long days at work. I also was my socks after each use. Here it would seem washing really is the main source of wear as it is very evenly spread.