The tog is the same; the duvet is not Which? tested 24 duvets with a panel of 40 testers and found that "the best synthetic duvets in our test scored just as highly for comfort as feather and down options, and in some cases surpassed them." So the answer to "which feels warmer, down or synthetic?" is not as simple as …

Two value brands, two different pitches Silentnight and Slumberdown both sell low-priced duvets to UK shoppers, and both cover the tog ratings most households need. They sell themselves differently. Silentnight leads with its name: its site calls it the "UK's most trusted sleep brand" and offers a "Lifetime product …