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CADR ratings, filter costs, and the noise spec nobody checks. Heres how to pick a bedroom air purifier that helps you sleep instead of keeping you up.

Five night lights that use red and amber light so you can see at 3am without wrecking your melatonin. From a $13 plug-in to the Helight.

Humidifier or air purifier for better sleep? Match the machine to your symptoms, dry throat points one way, allergies the other.

The TEMPUR-Adapt topper puts 3 inches of real Tempur foam on your bed with a 10 year warranty. It sleeps warm, and there is no sleep trial.

The Manta blocks light without pressing on your eyelids, and the adjustable cups are the reason. It's bulky and the velcro wears out.

The Sleep A30 brings real ANC to sleep earbuds for about $150. The catch: around 7 hours of battery with it on, and owners rate it just 3.7 stars.

The Marpac Dohm uses a real fan instead of a looped recording, which is why it still sounds better than digital machines twenty years on.

Dust mites live in your bedding and pollen follows you home. Five layers of defense, from a $10 fix to the one purifier worth buying.

Why We Sleep is the book that made people take sleep seriously. Great read, though Walker sounds more certain than the research supports.

Coming home from a long trip wrecks sleep for a week. These five picks help your body clock catch up faster, starting at about $10.