De or het reservekledij?

The correct Dutch article is:

de reservekledij

Rule Words ending in -ij and -erij: usually de. See the rule

How to use reservekledij

the reservekledijde reservekledij
this reservekledijdeze reservekledij
that reservekledijdie reservekledij
our reservekledijonze reservekledij
your reservekledijjouw reservekledij
every reservekledijelke reservekledij
which reservekledij?welke reservekledij?
a big reservekledij / the big reservekledijeen grote reservekledij, de grote reservekledij