De or het winteruitrusting?

The correct Dutch article is:

de winteruitrusting

Rule Words ending in -ing: almost always de. See the rule

How to use winteruitrusting

the winteruitrustingde winteruitrusting
this winteruitrustingdeze winteruitrusting
that winteruitrustingdie winteruitrusting
our winteruitrustingonze winteruitrusting
your winteruitrustingjouw winteruitrusting
every winteruitrustingelke winteruitrusting
which winteruitrusting?welke winteruitrusting?
a big winteruitrusting / the big winteruitrustingeen grote winteruitrusting, de grote winteruitrusting