From some of the research I did, higher density memory foam tends to have a higher life span than a lower density one Meaning it won't lose it's memory foam feel. We bought this memory foam to replace an old memory topper we bought a year ago. Our last memory foam topper was only 3lbs. density. It was good for about 5 months until it started sagging then it lost it's memory foam feel. It basically became a $200 oversize sponge. So my wife and I decided to buy this higher density topper. According to the instruction, this mattress require at least up to a minimum of 72 hours to fully expand although ours took only couple of hours. It doesn't have a strong overpowering chemical smell than our previous memory foam . The first night we slept on we can tell right away this has a more comfy "doughy" feel but also gives great support to your body. So far, we're loving it but it can be very warm especially if you live in a warm state like Florida. We bought Cool Touch TENCEL Lyocell Sheet Set to help out and so far its working great. I'll try to update this review in a few months.Update: It has been a year since we bought this. So far, it has kept it's memory feel but not like when its brand new. My only concern is, little pieces of the mattress are starting to tear out.
Since it was a topper alone, without a cover or other layers the facts can be checked. 4 inch Queen size topper 80X60X4=19200sq inches (converts to about 11.11 sq feet). It was delivered by Fed-Ex at exactly 50lb. I won't be to fussy with the pound or two for the box and plastic used in the packaging but you can see that 50 pounds devided by 11.11 = approx 4.5lb per sq foot, not 5. In this case since the memory foam was of such nice quality that .5lb difference is not that critical but still, honesty is the best policy.
5.3lb density is the relativly new industry standard for good quality memory foam. There seems to be a good deal of confusion about just what that means. Looks like most people are assuming that the higher the density the firmer the mattress or topper, but this is not necessarily the case. The ILD (indentation load deflection) measures the firmness and is determined by the vico-elastic formulation (recipe as it were). You can have 4lb and 5lb density foam, both with the same ILD measurment (same firmness), however, the 5lb having a higher density will tend to last longer. 5.3lb is the the happy medium between comfort and product longevity that has been determined through trial and error over the years by the foam industry.
At 4.5lb density this topper still qualifies as a very fine product and is worthy of your attention. I hope this US company will expand thier product line to include 5.3lb density foam and perhaps 2 or 3 ILD types (Soft, Med, Firm).
A word of advice. Stay away from memory foam that is made in ChinaMy husband and I love this mattress topper. We let it air out in another room for a few days to get rid of some of the smell it emits right out of the box, and then put it on the bed. The smell is still lingering a little bit, but it's not overpowering. It took a night or two to get used to the topper contouring to our bodies, but now I wouldn't trade it for anything! Now when I go to sleep, I pretty much stay in the same position instead of tossing and turning all night. When either my husband or I do move, or get into or out of bed, we don't jostle each other like we did before. I highly recommend this product. I would also suggest getting a mattress pad, because it doesn't come with a cover. Sleep well!I'm writing this at 6am because I can't get back to sleep and the reason for that is I slept so good! My knees and ankles are tingling from perfect relaxation. This topper is perfect for a firm latex mattress or even a boxspring! Must be the best buy on earth. Treat yourself right and no, I wasn't asked to write this. Don't waste your money on all the pedic hype.The bulky HEAVY package came ahead of schedule. The product was vac sealed and good condition. I let the unit air out for a few days and expand to 4.25 inches thick. There was a very pronounced chemical smell but after a few days I was okay with sleeping on it. The smell became more and more reduced and now I no can no longer detect the odor. I have had a 4 inch visco elastic memory foam topper in the past but over time the foam lost its memory (I dont recall the brand but I did buy it at Amazon.com) Hopefully this one will last more than 10 years.
Note: I am 6' tall, 210 lbs
So far so good. Very relaxing, just the right amount of give in all the right places.
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