This duvet is filled with care in Canada. The cotton shell is 360 thread count, so it is soft and quiet. The duvet is filled with 625 loft duck down. Down fill is soft and luxurious, made up of tiny, fluffy clusters. This duvet is fairly lightweight, but you'll find this duvet contains more fill than a duvet with higher loft down (700 or 850). This is because the higher the loft of the down, the better the insulating properties, and the less of it we need to achieve the desired warmth level! Conversely, you'll find it has less fill than a duvet with lower loft down (550 or 575).Summer Weight is great for hot sleepers or room temperatures are 22 degrees C or higher. Opt for Regular Weight if your room temperature is around 19 – 21 degrees C or if you’re fairly warm when you sleep. All Season Weight is best if your room temperature is 16 – 18 degrees C or if you’re a cooler sleeper.