Not sure if this will help you but I can say we are very happy with ours. We do have a King but what I'll list below is for a Queen. Also we did trim ours to fit a bit better within the King Night Stands, very easy to do, just incase you need to trim for some reason. Weight of this Queen shows 66 lbs.
https://novaformcomfort.com/products...mattress-queen
10” SoFresh™ Responsive Foam Mattress - Queen
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$499.99
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Nothing beats nice, clean sheets. Except a nice, clean mattress. Our NovaformŽ 10” SoFresh™ Responsive Foam Mattress is infused with copper, a natural freshening agent, and features an anti-microbial, machine washable cover. The triple layer design relieves pressure points, and offers all-night comfort. Its durable construction will last for years, and the cover will keep it fresh just as long.
One last thing, it shows if bought on Google the price is $449.99 plus tax.