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I couldn't find any independent mattress evaluations. The last Consumer Reports test a/o Jan. 2003 was in Mar. 1997 and they didn't evaluate memory foam or air/foam mattresses. The memory foam people claim tests showing improved sleep (see below). Major manufactures (Sealy, Serta, and Simmons) make almost identical mattresses to be sold by retailers who re-name the particular models, so it is difficlut to do comparison-shopping. Most mattress dealers will bargin. Higher price mattresses have more padding with foam, wool, silk or a down blend. Prices for Queen :
Helathy Foundations says that "visco-elastic memory foam, which provides a a far greater level of cushioning, support and pressure relief in comparison to standard or "eggcrate" foam pads."
Memory Foam
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Matress Size
W L
Crib 28" x 52"
Twin 38-39" x 74"
Full 53-54" x 75"
Queen 60" x 80"
King 75-76" x 80"
California King 72" x 84"
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Thickness New mattresses designs add extra padding and have greater thickness. This will require deep pocket sheets to fit correctly. * STANDARD DEPTH: 7 to 9 inches * DEEP MATTRESS: 10 to 15 inches * EXTRA DEEP: 15 inches to as deep as 22 inches | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mattress Firmness - 
Back Pain:Traditional wisdom was that a firm mattress was best for your back. This was when soft mattresses allowed sag so your back was curved. What you want is a mattress which allows you back to rest in a normal position. You want it to avoid sag but to be soft enough for your shoulders and hips to sink in when on your side. A medium firm mattress is usually best. There are pros and cons to waterbeds. If you lie on your stomach, the water bed allows you to increase the sway or the sag of the back. Claims that a mattress is "orthopedic" or "medically-approved" should be viewed skeptically. There has not been extensive medical research or controlled clinical trials on the topic of mattresses and low back pain. See: Choosing the Best Mattress for Lower Back Pain - spine-health.com Mattresses for Back Pain - Back Pain Center - EverydayHealth.com Supportive Bedding - back-shop.com The AlluraBed by Tempur-Pedic - The Healthy Back Store Indentation Load Deflection (ILD)
Information
Coil Spring Mattresses
Type of Foam Latex: (natural rubber)Open-cell sponge rubber - air or gas can pass through them similar to the way water is absorbed by a dish sponge. Closed Cell sponge (expanded rubber) Floats, Functions well as a shock absorbing material.
Foam - All foams are basically open-cell. Compression Deflection - Correct Measure of hardness. The weight required to compress a 1 cu. in. cube 25%. Types listed at: Foam 101 from Foam-Fabrication.com 1232 - This is a low cost foam great for items that are not used very often, Camping Pads, Kids Toys, Throw Pillows, Tumbling Mats, Etc.. 1835 - High Quality Standard Foam, Great for Couches and Chairs or anything that you need a high quality foam for. 1845 - Same as above but firmer. Recommended for couches that you need a firm cushion. White Visco - A 3 lb/ft3 Density very soft Viscoelastic material.. Recommended for mattress pads or anything you need to make a little softer. Swiss Visco - A 5 lb/ft3 Density material Somewhat firmer and more temperature sensitive. Different companies use different kinds of Visco Elastic foam also called memory foam, slow recovery or Swiss Foam. They seem to be based on the foam developed by NASA (see below), but I haven't seen any comparisons. e.g. Isotonic uses something called Conform and ViscoLux. HealthyBack uses a foam from Obus Form
Visco-Elastic Memory Foam: Developed for NASA to relieve extreme G-force pressures. Memory Foam molds to your body contours to help prevent tossing and turning during the night. When you lie down on this amazing material, the heat and pressure sensitive foam reacts to your body's weight and temperature, so that it molds to your exact body shape. This means that whether you sleep on your back, stomach or side, your weight is evenly distributed and your spine remains in a neutral position. Tests have shown that these mattresses actually improve sleep and increase the level of deep sleep, so you wake up more alert, refreshed and better rested. Recommended by over 25,000 medical professionals worldwide. Naturally treated cover protects you from harmful allergens, resists dust mites, and removes easily for washing. One problem reported with these mattresses is they do not breath and can be too warm in the summer. I got the following response from abed.com regarding this: From: "Roseanne McArdle, sleep consultant" <Roseanne@abed.com>See: Mattresses and Sleep
Latex Foam: Health Benefits Latex is antimicrobial and dust mite resistant, making it perfect for pulmonary allergy sufferers. It's ecologically-friendly and has no chemical properties or detrimental impacts to the environment. Additional Benefits Designed for breathability with an open-cell structure and special "pin core" construction, latex allows for ventilation of body heat. It also keeps moisture from building up next to your body. Aluminum core pins transfer curing heat into the foam. As a result, thousands of "pin-core" air-channels enable natural ventilation of the final product.
Dealers
Manufactures See Also: Back Pain and Injuries.
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