Surmatelas en mousse à mémoire de forme 4 po Clarendon

I found out, to my detriment, that 4" is just too thick for a memory foam topper! It sinks down too much when a person is lying on it, creating a valley that is uncomfortable on the spine, and making it more difficult to get out of. If you prefer that, to lying flat for sleep, then a topper this thick is right for you. If not, then just don't.