Latex topper on memory foam mattress, or, heat dissipation on memory foam

Mattress Talk Needs & Personal Preferences
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Hi MattressUnderground,

BACKGROUND:
I (5’2 160; stomach sleeper) and my partner (5’4 160; side sleeper) are trying to figure out a bed arrangement that minimizes motion transfer and reduces heat.
For a decade I’ve slept on a Sleep EZ three-layer latex mattress (3" firm talalay / 3" medium talalay / 2" soft dunlop)
While we find the mattress extremely, comfortable, there is too much motion transfer that wakes us up in the middle of the night.

We’ve tried different layers of talalay vs dunlop, and different firmnesses.
We’ve tried hybrid beds with a latex layer over individually coiled springs, but that is also too much motion transfer.
We are now trying a memory foam bed. But it sleeps too hot.

THE DETAILS
We inherited a used Signature Sleep Memoir (8" high density foam, 2" memory foam) which we find very comfortable in terms of pressure, and posture, and it does a great job at removing motion transfer, but it personally sleeps too hot for me. The bed specifications do not mention anything about ‘cooling’ layers that I am seeing mentioned for other memory foam beds. We are already considering a second bed and looking at the Helix Dusk.

The solution we are currently trying for the Signature Sleep Memoir is adding a latex topper to the mattress.
We moved the 2" soft dunlop layer from the Sleep EZ to the Signature Sleep, and it reduces the heat, but it re-introduces too much motion transfer.

MY QUESTION
Would a 1" soft talalay or dunlop topper be a next logical step?
Would that be thick enough to provide a barrier from the heat that would be trapped in the memory foam?
Would that be think enough to not reintroduce motion transfer?
I am hesitant to try a firmer layer because I need to sink into the top to relieve pressure on my shoulders.
Is there another configuration that might help with retaining the pressure and posture properties while reducing heat?
We are looking for a solution that mimics the pressure and posture but dissipates heat more.

Thank you,
Jacqueline

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Hi Jacqueline.

It sounds like you’ve already got a bed and you’re trying to make it work, is that right?

For motion transfer, you could try 2 individual latex toppers side by side as opposed to a single slab. This is generally very effective in reducing motion transfer. I don’t want to tell you to cut the one you have in half, though, because if it ends up not working out to your liking you’ve sliced and diced the topper without a resolution :whistle:

NikkiTMU

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Hi Nikki
Thank you for the suggestion. We actually tried this on the SleepEZ bed. It didn’t do much to reduce motion transfer, but I realize the underlying layers were still latex, and this might work better if the underlying layers are memory foam. I do still have the question of whether 1" might be sufficient to insulate from memory foam and further reduce motion transfer.

We are finding the 2" a bit too soft, and wondering if we should invest in another 1" topper that will still insulate from heat, or just replace the bed with a ‘cooling’ memory foam bed.
Are memory foam beds with cooling layers actually effective at cooling? Or is it a marketing gimmick?

Thank you.