If you’re looking for a way to add a dose of “cozy” to your bed, start with the best duvet inserts, which fit snugly inside your favorite duvet cover. With its affordable price tag and ...

An Amazon best seller, this duvet insert has racked up more than 98,000 five-star reviews and has a 4.5-star average rating.

Why buy: The point that makes the most impact on the many Endy Duvet reviews? That it’s a not-too-hot-not-too-cold insert. How does Endy do it? The fill: Phase Changing Materials (PCMs), which ...