For treating and preventing bed sores, we would recommend a cushion or mattress with cool-gel or an alternating air technology inside. These are designed to ease the load on your pressure points, and improve circulation. They will also provide a cooling effect, and therefore reduce sweating which can cause bed-sores to become worse. It is always a good idea to consult an Occupational Therapist to help you identify the best product for you, and if you have pressure wounds already then you should visit your GP.