Choosing a duvet can be complex as there are so many products on the market. It's essential to know your preferences in terms of weight and volume.
Do you like fluffy? Prefer a padded duvet. For a feeling of weight without excessive heat, only weighted comforters really work. 100% cotton, 100% polyester or polycotton. Synthetic shells exhibit less breathability, although there are polyester fabrics with hollow fibers or surface treatments for better moisture wicking.