Originally, plaid drawstring pants, but they also eventually sold shorts like the ones shown.

Will Smith wore the pants on Fresh Prince.

The brand still exists: https://skidznyc.com/pages/about-update

This is cool too:

SKIDZ not only pioneered a look, but has been socially and environmentally conscience since day one. SKIDZ uses “spot goods” which helps eliminate material waste and keeps fabric from ending up in landfills or in some cases burned