Plural of 'Traje de bano'

In 3.3 They use both “trajes de baño” and “trajes de baños” as plural for bathing suits (in the subtitles for the audio lesson). Are both correct? Is this a typo?

¡Hola mmmatt!

Thanks for pointing this out to us - the S on the end of baño was indeed a typo in the audio subtitles. The plural of traje de baño is trajes de baño. 

I have passed this on to our Spanish team and they have updated the subtitles, so this should be fixed now. 

Our apologies for the confusion!

Saludos,

Liss