It is always best to wash duvets. We strongly recommend against dry-cleaning duvets. The reason is that dry cleaning makes use of chemicals like PERC, which are known to be carcinogens.
Whilst harmless for dry cleaned clothes, these can be harmful in duvets which are right next to your nose and mouth when you sleep at night. You inhale the carcinogens throughout the night. This may not have any immediate impact, but the effects may accumulate over time. So, we strongly advise against dry cleaning their duvets, and opt for washing your duvet with water instead.