I Slept Better Than Ever With Eight Sleep’s Temperature-Regulating Pod 4

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Finding the right temperature in bed can be tricky. Feeling too hot or cold makes it tough to drop off and can wake you prematurely. Since our mental and physical health depends on sleep, that’s a problem. Eight Sleep has the answer. The Eight Sleep Pod 4 is a temperature-regulating mattress cover that tracks your body as you snooze, with a hub that pumps cooled or warmed water into the cover to help you stay in the land of nod for longer.

When I tested its predecessor, the Eight Sleep Pod 3 (7/10, WIRED Recommends), I was wary of the billionaire biohacking buzz, but it won me over. Aside from the increased comfort, the best sleep trackers all told the same story: My wife and I slept longer and got more deep sleep and REM with the Eight Sleep Pod than without. The Eight Sleep Pod 4 brings some welcome improvements, including greater comfort, quieter operation, and handy tap controls, so you don’t have to reach for your phone at night.

Photograph: Simon Hill

Sadly, better sleep does not come cheap. A Pod 4 Cover and Hub for a queen-size bed costs $2,599, but you must also take a year’s subscription to Autopilot for an extra $199. If you already have a subscription, you can transfer it to a new Pod, but you can no longer buy an Eight Sleep Pod without taking the Autopilot subscription. The UK Super King I tested costs £2,699, with a year of Autopilot at £199. It’s a real investment, but sleeping soundly can be transformative.

Hitting the Hay

The Eight Sleep Pod 4 Cover and Hub come in two large boxes. The mattress cover has rubber tubing inside and a soft, plush, dark material on top. It is elasticized for a snug fit on your mattress, and tubing must be routed from the top to plug into the hub. The hub is about the size of a desktop PC, with a fabric front and a big 8 logo. The hub is the brain of the operation, and it cools or heats water and pumps it around the cover.

Setup with the Pod 4 was similar but much quicker than the Pod 3. You pull the cylinder out the top of the hub and pour water up to the fill line. The priming process has dropped to around 10 minutes from a couple of hours for the previous version. You connect the hub to your Wi-Fi using the mobile app. The Pod 4 cover is much comfier than the Pod 3, and the hub is far quieter. It never broke 30 decibels when measured. It makes a subtle hum, like a white noise sleep sound.

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