These 18 Comforters and Duvets on Amazon Basically Guarantee Better Sleep

Bedsure Cotton Duvet Cover Set ($43)

If you're in search of a pop of pattern, there's nothing more classic or sophisticated than a neutral stripe. This one in the khaki colorway looks way more expensive than it is. It has a hidden zipper closure at the bottom and is made from breathable cotton, so it can fly solo during warm weather or be layered when the temperature drops.