a flock of t-shirts

flock (noun) - finely powdered wool, cloth, etc., used for producing a velvet-like pattern on wallpaper or cloth or for coating metal.

many vintage t-shirts in the 70s and 80s were personalized with iron-on's at home and at booths in the mall. 

the fuzzy felt letters used to spell out words are called 'flock.'

if you ask me, t-shirts do not get more one-of-a-kind and interesting. 

check out all the SHV flock shirts currently in stock here: flock of t-shirts