What are the best soft mattresses for heavyweight sleepers over 230 Ib?

For heavyweight sleepers who weigh over 230 pounds, the best plush mattress should provide adequate support and pressure relief.
Here are some tips:
Choose a plush mattress with a higher firmness rating, such as 5 or 6.
Choose a plush mattress with good edge support.
Choose a plush mattress made from durable materials, such as memory foam or latex.
Choose a plush mattress with good breathability to help you stay cool and comfortable.