De or het reservekleding?

The correct Dutch article is:

de reservekleding

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) extra set kleding die wordt meegenomen of klaargelegd om te dragen als de oorspronkelijke kleding vies, nat of onbruikbaar is geworden.

How to use reservekleding

the reservekledingde reservekleding
this reservekledingdeze reservekleding
that reservekledingdie reservekleding
our reservekledingonze reservekleding
your reservekledingjouw reservekleding
every reservekledingelke reservekleding
which reservekleding?welke reservekleding?
a big reservekleding / the big reservekledingeen grote reservekleding, de grote reservekleding

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).