I’ve been sleeping on a Plank mattress for about six weeks. It was fine until the last week or so, at which time I started to develop back pain due to the mattress being too soft.
When away from the mattress for an hour or so, it feels suitably firm upon return when I test it with my hands and when I lie on it. However, after lying on it for any substantial period, the foam seems to soften substantially. An online search seems to support the idea that warmth from both the room temperature and from body heat tends to soften foam mattresses. This presents something of a challenge for me since, for various reasons, I tend to require a room temperature in the high 70s to be comfortable and to be able to rest.
I’m posting to (a) see if others have faced this issue; and (b) to get suggestions as to how to address this issue. My thoughts so far are to wear warmer bed clothes (long underwear) and lower the room temperature. Plank has a cooling mattress protector that might help.
If anyone has successfully addressed this issue, any input would be appreciated.