Best Down Comforter for Hot Sleepers and Summer

Cuddle Dreams fills this summer weight comforter with Australian wool inside a jacquard cotton shell, certified to OEKO-TEX Standard 100. It has eight ties at the corners and edges for a duvet cover, and a short zipper so you can look at the fill yourself, which is a sensible touch for a natural fill.

Wool does not loft like down, so a wool comforter is flatter and drapes closer to the body. What it does well is handle moisture. It takes up damp from the air under the covers and lets it go again, so a warm night feels less clammy than it does under polyester.

Skip it if you want the puffy hotel look. Wool comforters are thin by nature, and this is the thinnest of the maker's three weights.

The catch. Less published about construction and care than the larger brands give, and a flat, dense look on the bed.

Brooklinen fills its lightweight down alternative with a recycled polyester microgel, sewn into baffle boxes inside a 100% cotton sateen shell. It is certified to OEKO-TEX Standard 100 and the Global Recycled Standard, and the listing says it is made in the USA from imported materials.

Brooklinen points the lightweight weight at warm sleepers and rooms above about 70°F. Unlike down, it is fine in a home washing machine, which matters to anyone who washes bedding often or has a pet on the bed.

Skip it if you have no reason to avoid down. Synthetic fill is heavier for the same warmth and loses loft sooner, so the down version below lasts longer for about $80 more.

The catch. Sateen is a little warmer to the touch than percale, and synthetic fill compresses over years of use.

Woolroom is a British wool bedding maker, and this is the light weight of its Deluxe comforter: 100% British wool, carded and quilted into an unbleached 200 thread count organic cotton cover so the fibers cannot migrate. Each comforter carries a QR code that traces the wool back to UK farms.

It is one of the few comforters in this guide with a stated fill weight, 5.9 ounces per square yard, which is the figure that actually tells you how warm a comforter will be. It is certified by Allergy UK and fully machine washable, then line dried.

Skip it if you have no way to line dry a queen comforter. Woolroom says not to tumble dry it, and wool takes time to dry through.

The catch. Line drying only, and like all wool it is flatter than down on the bed.

Boll & Branch's lightweight insert is the lightest of its three down weights. The down is responsibly sourced and triple washed for a cleaner loft, and Boll & Branch says its products are traceable from farm to finish. The shell is certified organic long-staple cotton, woven tightly enough to be down-proof without harsh chemicals.

Baffle box construction keeps the fill in place, and four corner loops tie into the brand's duvet covers. Boll & Branch says it can be machine washed alone in cold water once a season and tumble dried on low, which may take several cycles.

Skip it if a published fill power is your deciding figure; Boll & Branch does not give one. Brooklinen's lightweight gives its number and costs $130 less.

The catch. No published fill power or fill weight, and the highest price here.