![]() On top of the polyform is a layer of memory foam that cushions the body and provides pressure relief. Next, there are two layers of high-grade polyform that provide ergonomic support. On top of the base layer are hundreds of coils that Helix says help limit motion transfer and cradle the body. The bottom layer is made of dense foam that provides a sturdy base for the rest of the mattress. The Helix Midnight has five layers, including memory foam and coils. When I put a 25-pound weight close to the glass, the glass tipped over far enough that water spilled out even though the glass was not filled to the top. The water sloshed around quite a bit in the glass. I put a glass of water on the edge and walked around the mattress. However, the Helix Midnight didn’t perform well on my edge support test. Because I have a young child who often winds up in bed with me at night, I frequently find myself pushed to the side of my mattress, so this is a very appealing feature for me. To provide extra support along the long edges of the matter, the Helix Midnight includes reinforced coils along the sides. Because of this, even though motion isolation could be better, it’s not poor enough to affect sleep for most people. However, when I was asleep I never woke up due to his movements. When I was awake on the mattress, I could feel when my partner shifted position. When I put a weight next to the glass, the glass noticeably tipped to the side. The water moved in the glass no matter how close or far away I was from the glass. I put a glass of water on the mattress and walked around. Motion isolation is not the best feature of the Helix Midnight. ![]() However, Helix does sell an upgraded cooling cover that I was open to buying if necessary to make the mattress more comfortable. I wasn’t too hot sleeping with the included cover. To take care of this problem, the Helix Midnight comes with a Breathable Soft Touch knitted cover that provides extra airflow. I tend to sleep hot, so I am wary of memory foam mattresses that have a reputation for being hot. This test confirmed my initial impressions that the top is plush but the memory foam underneath provides support. The knit cover noticeably pulled under the strain and the weight clearly sank into the top layer, although not much. To test the firmness of the Helix Midnight, I put a 25-pound weight on the mattress. On subsequent nights my sleep score was lower, but still higher than average, so I think the Helix Midnight is helping me get a better night’s sleep. I strongly suspect that the Helix Midnight played a role in my getting a higher sleep score than ever before. There are a lot of factors that go into a good night’s sleep, but I was thrilled when I woke up on the third night of sleeping on the Helix and discovered that my sleep score was 98 – the highest it’s ever been. I’m devoted to wearing my sleep tracker, and while I try to practice good sleep hygiene my “sleep score” is usually in the 70s. Perhaps the biggest indication of this mattress was my sleep score. I was relieved there were no unpleasant off-gassing odors. However, since the instructions said that it could take one to two hours for the Helix to fully decompress, I resisted the urge to jump on and test it out right away. Once I cut off the layers of plastic, the mattress seemed to achieve its full shape and 11.5” of height almost immediately. However, once I got through the layers of thick plastic and the mattress began to decompress, I realized that it was also wrapped in a thinner protective layer of plastic, so I probably didn’t need to be quite as cautious in my cutting as I had been. Cutting through the layers took a long time, in part because I was worried about slicing the mattress in the process and cut through each layer very slowly. The mattress and complimentary pillows were compressed using several layers of thick plastic. Helix recommends removing the mattress from the box to the room where it will be used, but I found it easier to remove the mattress from the box and carry it to the bedroom where it was I planned on doing my testing.
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