De or het wintermode?

The correct Dutch article is:

de wintermode

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

How to use wintermode

the wintermodede wintermode
this wintermodedeze wintermode
that wintermodedie wintermode
our wintermodeonze wintermode
your wintermodejouw wintermode
every wintermodeelke wintermode
which wintermode?welke wintermode?
a big wintermode / the big wintermodeeen grote wintermode, de grote wintermode