It’s important to look for the right material for you, as preferences can vary from person to person. “Fill material comes in a few different categories, including goose or feather down, alternative down, and cotton-filled,” Sun says, noting that each material has its own benefits. She adds that goose down is a more expensive material, but it also has a wide warmth range and superior loft and volume. Down alternative is similar to goose down with a wide warmth range, but it typically costs less and is easier to care for compared to goose down. Lastly, cotton fill “has superior breathability and is perfect for warm sleepers and those looking for a 100 percent natural down alternative.” As for the comforter shell, Sun says the preferred material is a premium 100 percent long-staple cotton, since it’s breathable, machine-washable, and durable.