German tongue twister taster

"Fischers Fritze fischt frische Fische;
Frische Fische fischt Fischers Fritze."

According to the 1st International Collection of Tongue Twisters, this one translates as:

Fisher's errand boy is fishing fresh fish, fresh fish are fished by Fisher's errand boy.

Unfortunately, there is no translation available for his shirt.

One more teaser to follow...