Hi John and Ryan, Thank you for your website. I have found it to be by far the most informative on the subject of mattresses. I am looking for a good quality mattress for my 9-year old son (soon to be 10) who weighs 32 kg. He has been complaining that his open-spring mattress (which I purchased seven years ago from Marks&Spencer) was too hard and uncomfortable. Some companies, such as Next, sell "kids' mattresses". These are quite cheap (£250 for the luxury version, which is described as a medim, 480 pocket-spring mattress with 4 layers). Would this type of mattress be supportive enough in a few years' time or should I better invest in a more substantial mattress?

I am also concerned that this mattress might be too firm again, despite being described as medium. I look forward to hearing from you. Kind regards, Nathalie .