Instead of purchasing a new mattress, which uses valuable timber and can be hard on the environment to produce and transport, consider buying a mattress pad to increase the lifespan of your old bed.
Purchasing new? Go for a bed that’s environmentally friendly. There are many brands that offer mattresses made from organic and non-toxic materials such as wool, latex, soy based foam and surface coverings made from natural materials. These are easier on the environment to produce.