noun
memory foam mattress
A mattress made of low-resilience polyurethane foam that conforms to the body and slowly returns to its original shape.
低反発マットレスは体圧を分散してくれるので、腰痛が楽になりました。
The memory foam mattress distributes body pressure, so my back pain has eased.
この低反発マットレスは寝返りがしにくいという人もいます。
Some people say this memory foam mattress makes it hard to turn over in bed.