Sandals are a tradition in Jerusalem's Old Cite while an Arab keffiyeh head-dress (as modelled by Yasser Arafat) is useful for warding off desert dust and sun.
Sandals are a tradition in Jerusalem's Old Cite because they're considered fashionable.
mnli hypothesis: Sandals are a tradition in Jerusalem's Old Cite because they're considered fashionable. premise: Sandals are a tradition in Jerusalem's Old Cite while an Arab keffiyeh head-dress (as modelled by Yasser Arafat) is useful for warding off desert dust and sun.