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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 10 Mar 2015 15:36 #71

  • LJGMDAD
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So after the swap you could also try SMS in addition to SSM. I'm not sure what to say. How long have you had this mattress? Is it beyond the recommended break-in period?

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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 10 Mar 2015 16:22 #72

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So after the swap you could also try SMS in addition to SSM. I'm not sure what to say. How long have you had this mattress? Is it beyond the recommended break-in period?

6 days. With the extra soft layers I could go from SMM to SSM, SMS or SSS.

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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 10 Mar 2015 17:13 #73

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I'm going to go out on a limb and say you haven't given it enough time.

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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 10 Mar 2015 18:58 #74

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Hi LJGMDAD,

I'm going to go out on a limb and say you haven't given it enough time.


I think that your limb would be quite "safe" :)

Phoenix
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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 11 Mar 2015 22:40 #75

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I'm going to go out on a limb and say you haven't given it enough time.

How much sinkage should I have on the SMM side (6'3" 160lbs) ?
My friend came over and we tried to measure it and I'm only getting about 1/2" down in the top soft layer when laying on my back.
But I'm so "straight" on it that I feel like I'm laying on the floor....by upper back/shoulder get a lot of pressure, as well as my hips and legs.
When on my side, I'm going down about 1", but again even more pressure on my shoulder/arm, hip and legs.

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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 11 Mar 2015 23:14 #76

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I'm going to go out on a limb and say you haven't given it enough time.

How much sinkage should I have on the SMM side (6'3" 160lbs) ?
My friend came over and we tried to measure it and I'm only getting about 1/2" down in the top soft layer when laying on my back.
But I'm so "straight" on it that I feel like I'm laying on the floor....by upper back/shoulder get a lot of pressure, as well as my hips and legs.
When on my side, I'm going down about 1", but again even more pressure on my shoulder/arm, hip and legs.


I do find it interesting that SMM feels too firm at your weight. And I wonder if the mattress cover needs to be stretched out more so than the latex needing to soften. Either way, you need to give it time. And I doubt there's an answer that can be given to the question "how much should I sink?". I'd think it depends on your anatomy. In other words you should have proper spinal alignment on your mattress, and how much you should sink to achieve that will most likely vary from person to person.

For a side sleeper:



Again, all orientations:



People are reporting noticeable softening of SleepEZ mattresses after 30-40 days too. So, 6 days just can't possibly be enough time.

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Last edit: by LJGMDAD.

Hate my Tempur Rhapsody, replacing with Aireloom or Prana 12 Mar 2015 00:38 #77

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Hi FAUguy,

How much sinkage should I have on the SMM side (6'3" 160lbs) ?


You would need some very sophisticated measuring and testing equipment to be able to calculate that. It would depend on the shape and weight distribution of your body and once you had measured that accurately then it would take some very high level math to figure out an algorithm that took into account the response curve of the different layers of latex and the changing surface area of your body as you sink in deeper.

Just for reference the ILD of latex is measured on a 6" core with a 50 sq in compressor head and the ILD is the amount of force it takes to compress the 6" core by 25% (1.5"). There is a video here for Latex International which shows their ILD testing (at 3:00) and one for Radium here (click step 9) which shows their ILD testing.

50 square inches is a diameter of just under 16" so the compressor head would be "about" the size of a bum. If you had a 24 ILD 6" core then it would only take 24 lbs to compress the latex 1.5", if the core was 32 ILD it would take 32 lbs, and if the core was 40 ILD it would take 40 lbs. I would guess that there is probably more than 40 lbs of pressure under your bum. I just weighed myself lying on the floor with a flat scale under my bum and it was putting 79 lbs of force on the scale (I weigh about 200 lbs) so if you weight 160 and your weight was distributed roughly the same as me you would be putting about 63 lbs of force on the same scale so your bum would sink into a 6" core of 40 ILD latex more than 2" if you do the "rough math". Using the same math your bum would sink into a 6" core of 24 ILD latex more than 3" and probably closer to 3.5". Of course this is very "rough math" because I don't know your exact measurements or your weight distribution and that would take much more sophisticated equipment.

There is also a more complicated (and probably not very accurate) example of some "rough math" with multiple layers in post #26 here and you can see a similar "rough math" example that applies to pressure relief (rather than how much you sink in) in post #2 here .

Having said that ... regardless of how much you are sinking in or how much pressure you would have if it was measured ... all that really matters is that you sleep well and as LJGMDAD said I would give it a few weeks at the very least (and hopefully you've checked the other suggestions I made previously as well).

Phoenix
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Last edit: by phoenix.

Hate my Tempur Rhapsody, replacing with Aireloom or Prana 12 Mar 2015 07:52 #78

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The math of bums! So would a 6" core have any more resistance than a 3" core at the same pressure and same ILD? I'm just curious. I had looked at the Botanical Bliss which is a 6" core and 3" comfort layer, and I had previously thought it'd provide a more solid foundation somehow. But I do think I favor the combination of 3 3" cores instead - just to have more options.

Oh and speaking of the Botanical Bliss - there's one retailer that does make a big to-do about their certifications! But, again, how to put a price tag on that is questionable at best. I.e. if the latex is all natural, then what does an additional certificate on top of that do for me? But I digress....

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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 12 Mar 2015 11:22 #79

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Hi LJGMDAD,

So would a 6" core have any more resistance than a 3" core at the same pressure and same ILD?


If they were both on a solid surface then a single 3" core would be firmer than a 6" core because it would be compressed to a greater percentage of it's total thickness (see post #14 here about the effect of thickness).

I had looked at the Botanical Bliss which is a 6" core and 3" comfort layer, and I had previously thought it'd provide a more solid foundation somehow. But I do think I favor the combination of 3 3" cores instead - just to have more options.


If you have two 3" layers that are both the same ILD as a single 6" layer they would be very similar. There is more about two 3" layers vs a single 6" layer in post #2 here .


Phoenix
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Hate my Tempur Rhapsody, replacing with Aireloom or Prana 12 Mar 2015 22:02 #80

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Hi LJGMDAD,

So would a 6" core have any more resistance than a 3" core at the same pressure and same ILD?


If they were both on a solid surface then a single 3" core would be firmer than a 6" core because it would be compressed to a greater percentage of it's total thickness (see post #14 here about the effect of thickness).

I had looked at the Botanical Bliss which is a 6" core and 3" comfort layer, and I had previously thought it'd provide a more solid foundation somehow. But I do think I favor the combination of 3 3" cores instead - just to have more options.


If you have two 3" layers that are both the same ILD as a single 6" layer they would be very similar. There is more about two 3" layers vs a single 6" layer in post #2 here .


Phoenix

I was going to try and contact SF and Aireloom next week to see what type of foam is used on their upper layers.
What classification questions should I ask...such as what type of foam, ILD, weight?

It was mentioned that maybe the cover was still to firm, so today I unzipped it and had the sheets right on top of the latex, but still felt the same type of "up pressure" that is making me soar.

I did that the two Magniflex dealers in my are actually home decor type of stores and only have one of those models on display.
So they recommend going down to the Miami Magniflex Gallery (an hour south of me) to try all of them out. But if I were to order one, there is no exchange or return since Magniflex cannot resell or recycle used mattresses. So that right there would probably prevent me from every buying one.

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Last edit: by FAUguy.
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