INFPs do not dress to flaunt their bodies, their status, or their money. Rather, Tieger has noted that INFPs prefer clothing, hairstyles and accessories that express their unique, individual self. The emphasis on "unique" and "individual" implies that it will pretty much not be normal. INFP garb may seem a bit eccentric, offbeat or avante garde; they may wear clothing with curious patterns or dress with a "60s" flavor. If you ask an INFP about the meaning behind their clothes, you may find out about some unexpected symbolism, i.e. "This blue scarf represents warmth and comfort for sadness." Tieger further notes that INFPs may wear tokens of the causes they support, i.e. a pink ribbon for breast cancer awareness, or a "Save the Children" pin. Presumably an INFP car will feature similar bumper stickers.
A website that must remain nameless thanks to its disappearance from Google's radar has suggested that INFPs may be likely to wear black as a sign of inner unhappiness. (Given the college depression that INFPs are prone to, this is not unlikely.)
As Perceivers, INFPs tend to dress casually and comfortably. They "let their hair down" and are not too particular about getting everything right.
One further identifying mark Tieger has suggested for INFPs is lack of outer awareness due to inner preoccupation. Because of their dreaminess, they may be come across as something of a clutz ("oops, I didn't see that there") or absent-minded. In literature, many NF heroines are berated for their "clumsiness."