De or het thermokleding?

The correct Dutch article is:

de thermokleding

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) kleren die direct op de huid worden gedragen met als doel de lichaamstemperatuur te reguleren.

How to use thermokleding

the thermokledingde thermokleding
this thermokledingdeze thermokleding
that thermokledingdie thermokleding
our thermokledingonze thermokleding
your thermokledingjouw thermokleding
every thermokledingelke thermokleding
which thermokleding?welke thermokleding?
a big thermokleding / the big thermokledingeen grote thermokleding, de grote thermokleding

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