A lot of upholstered furniture is not made with the best grades of foam available. Most people do not know that there are that many different grades because furniture makers don't take the time to educate them properly. What's inside the cover matters and plays a very integral part to your long term comfort and to the overall look of the furniture. The foam used is as important to your couch as the foundation is to your house and they both support the pretty things that go on top. However, since it is not visible there is a lot of room for substitution of lower quality materials. Don't let this happen to you.
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High Resilience: with high resilience and durability, the 40 density foam provides great support to repair sagging couch cushions; Safe and reliable,
Thyle 3 Pcs Couch Sofa Cushion Support for Sagging Seat 20'' x 20'' x 2'' Replacement Couch Cushions High Density Foam Curve Under Couch Cushion
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Better Sleep and Real Comfort Blog
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