In the most literal sense, swag clothing is apparel with the word “swag” or mottoes about swag emblazoned on it, which is available from Zazzle, Inc., as of 2014. Colloquially speaking, however, swag clothing is that which references pop culture with color, style or logos/sayings.
Swag clothing can include stylish and bold accessories like caps, sunglasses and socks. In the slang sense, what is swag is subjective because style is not universal: one person’s fashion do is another’s fashion don’t. Additionally, people often refer to the freebies they receive at events as "swag;" therefore, swag clothing could be a souvenir t-shirt from a concert, for example.