For me they aren't! No support! I just got one less than a week ago and I haven't had this much back pain in four years. That's when I had a whiplash accident. Now the pain is back! I'm also getting some sciatica. O' boy! I just bought a Sealy trueform 'cool springs' twin mattress less than a week ago from a place called "EDITED". It's terrible! My old 19 year old bed was better. Even though it had lumps, it didn't cause any back pain. The memory foam doesn't keep my back and spine straight. It bows from the least amount of weight. This is unacceptable! When sleeping on it it feels like a water bed filled with an inadequate amount of silicone jel. You just continue to sink deeper and deeper. It's atrocious. I just thought I'd warn everyone here. Firm is best because you get support for your back and spine. I don't mean a hard bed. I mean a bed that keeps your back more or less straight. For people with back pain, spine injuries, sciatica, and people who don't want any of these problems, AVOID AT ALL COSTS!

EDITED
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Edited by moderator JEAUX