I'm still blown away, in this day and age, by how many parents don't make their kids wear helmets on bike trips. It's almost as shocking to me as people who take up smoking.
You don't need a special item for every damn activity. That's capitilasm at its finest. You don't need to go buy a special suit to ride a fucking bike around without your asscrack hanging out. You just need to not be a fatass and wear clothes that fit you.
I don't think I've ever seen someone wearing cycling specific clothes for normal commuter trips. Other than maybe putting on a rain coat/pants over their normal clothing.