The present invention concerns a mattress arrangement (100) and mattress. More particularly, but not exclusively, this invention concerns a mattress to assist in the prevention of pressure sores, and a method of reducing pressure sores. A mattress comprises a first air-holding portion (102) and a second air-holding portion (104). The first air-holding portion comprises the approximate middle section of the mattress and the second air- holding portion comprises the foot portion of the mattress. The first air-holding portion is connected to the second air-holding portion via a connecting portion arranged to allow only one-way airflow from the first air-holding portion to the second air-holding portion. The first air- holding portion includes a one-way air inlet valve and the second air- holding portion includes a one-way air outlet valve.
