If your quality of sleep has ever been compromised by night sweats, soaring temperatures or stuffy surroundings, then you’re well aware of the lengths you would go to achieve cooling comfort. And while standard fans and traditional AC units are always the first items to try, sometimes they are ill-equipped to address the temperature beneath your sheets.

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That’s where the BedJet can come in. This clever and discreet fan unit blows air in the temperature of your choice directly under the covers and reviewers are calling it “life-changing,” a “most favorite purchase” and an appliance that is “worth the price.”

It utilizes the basic idea of ventilation to not only rapidly cool hot sleepers, but to wick away moisture, which is imperative for anyone who’s prone to sweating in their sleep or living in humid conditions.

It also uses what the brand refers to as “biorhythm sleep technology,” a setting that allows sleepers to personalize temperature settings for every hour of the night to keep the sleep environment more regulated and, ideally, keep you asleep. This feature kind of gives the BedJet a leg up over ACs that aggressively blast overly cold air or fans that don’t really drop the temperature in the room, but just circulate hot air instead.

The BedJet isn’t just for warm weather woes either. It’s perfect for year-round use thanks to the heating mode that “gives a deep sauna-like warmth in just seconds,” according to the brand.

The basic model conditions the whole bed to the same temperature (consider the dual-zone Cloud Sheet to keep the temperature to one side) while the Dual Zone model allows either half of the bed to be controlled independently for sleepers that have different temperature preferences.

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The unit itself measures just under six inches tall and slides seamlessly underneath most bed frames. Then, the hose and nozzle securely attach underneath your mattress on any side to stay in place all night long while your bedding lays over the top of the nozzle.

There’s no need to adjust your existing bedding mattress set up, although the brand does have a specially designed Cloud Sheet which fits over the nozzle to provide a much more even distribution of air compared to standard sheets. Additionally, there’s a dual-zone Cloud Sheet which can be helpful when you have a single BedJet unit and you want to restrict the air flow to only one side of the bed.

According to reviews, the BedJet’s operation is impressively quiet and it’s appreciated how easily the fan can be controlled with either the smart app or the light-up remote (the remote-included option is slightly more expensive than the version that’s just controlled using the app).

Read more words of enthusiastic endorsement from other BedJet customers down below or shop a BedJet option that’s best for you from any of the links above.

Promising Amazon reviews:

“I’ve had it for two nights now and I had my doubts about such an expensive item. I got this on prime day and the discount made it worth trying. However, now that I’ve used it, I would GLADLY pay the full price for it. It is as good as they say. It really does cool you UNDER the blankets. I’m an EXTREMELY hot sleeper. I have to have a fan on me. First night I had the fan on because I wasn’t sure. By the second night, I had the BedJet set to 45% fan, and my fan was off. And I was COOL and comfortable all night. It is absolutely wonderful to sleep so comfortably. If you are a hot sleeper, please please do yourself a favor and TRY it. You will not be sorry. It is wonderful. You will really enjoy this if you have the night sweats. I would absolutely buy it again and now my gf is thinking she wants to dual zone so she can have her side set up the way she likes it. She’s THAT impressed with what it does for me.” —Brian Garcia

“Life changer. My boyfriend runs hot blooded and this has been a game changer. He gets better sleep at night, no more night sweats and if I get too cold I point it to him only. Definitely worth the price even though it is steep. It’s light weight, easy to install and if you have space under the bed (we don’t unfortunately) then you would be able to hide it better. It’s not too loud either it’s like having white noise.” —QiQi

“I was having the most horrible night sweats. I had been told about the bed jet, but thought it was sooo expensive. After losing almost a year of sleep, I decided to take a chance. And it has changed my life. The fan is very quiet, It’s not freezing cold but just enough to cool me down before I get soaking wet. It’s easy to set up and remove in the morning (I slide the hose under my bed). I love it so much, It’s so delightful, the only thing that would be better is not being woken up by a hot flash! It’s my most favorite thing Ive purchased in a long time, and I I’ve never been so happy about buying an appliance.

Also, I hooked it up more toward the middle of my bed/body since the hot flashes are basically from the waist up (and I hate having cold feet), and it does not bother my partner. All I have to do is put my arm down and the cooling air does not get to the other side of the bed.” —Heidi

“I bought the BedJet because I was so tired of being hot at night, and no I’m not going through the change just yet! Basically my room is above my car garage and I live in Florida, so it heats up my room so much that it’s miserable hot during the night. I had enough one night and bought this! NO REGRETS HERE- the only regret is not buying this sooner!!! I sleep like a baby! If I get cold, I don’t need my boyfriend to warm me up (lol!) I got my BedJet to do it for me! This is discreet, and you can’t tell I have it on my bed. I have a bed with a footboard and I was able to get it through and it’s perfect. Easy to use, love the remote, I swipe my thumb over it and it lights up, nifty little feature especially at night. I love everything about my Bedjet. Also, I love the quality of the sheet that you buy separately to attach the bed jet to, it feels amazing on the skin.” —Yoli Buenaflor

“I am a very hot sleeper and often wake up hot and sweaty even in a freezing cold house in Winter. The BedJet is absolutely wonderful. The constant cooling air under the blankets keep me cool and dry. I have not had a single sweaty hot sleep experience since purchasing the BedJet. I have tried everything. The BedJet really works.” —Bron C Hedman

Get it from Amazon for $549+ (available in two models).

Reviews have been edited for length and/or clarity.