Avoid covering the bed with a bedspread in the morning, as the down has to be able to get rid of its moisture!
If you sleep on your side, choose a high pillow!
In order to avoid cold bridges, all quilts for year-round and winter use have channelled walls separating the two layers of material that surround the down.
This ensures that there is down all over the duvet lying right up against the walls, instead of through-stitching which just presses the down away from the stitching.
Varying numbers of boxes are used depending on the filling quantity. More boxes are used for a low filling quantity in order to keep the down in place.
For summer duvets quite small squares are used as well as through-stitching, i.e. no channelled walls to keep the low quantity of down in place.