De or het reddingvest?

The correct Dutch article is:

de reddingvest

This word is not in the word lists we use to double-check answers.

How to use reddingvest

the reddingvestde reddingvest
this reddingvestdeze reddingvest
that reddingvestdie reddingvest
our reddingvestonze reddingvest
your reddingvestjouw reddingvest
every reddingvestelke reddingvest
which reddingvest?welke reddingvest?
a big reddingvest / the big reddingvesteen grote reddingvest, de grote reddingvest