The duvet is too hot to breathe?

Generally, duvets are airtight, and the down quality of duvets is usually not very good.

Either the cashmere content is very low, some have high cashmere content, less cashmere flowers and too much wool, so it is either velvet drill. In order to prevent velvet drilling, merchants will use coated tarpaulin to solve it, which is airtight.