Are you Wondering on how to find the best mattress? We offer our advice on choosing this important purchase and the best retailers to go to to buy it at, whether you want memory foam or pocket spring, budget options or luxurious buys, According to sleep experts, your mattress needs changing every seven years. Although this might seem like a bit of a hassle, your needs, personal preference and requirements will change too–and what once was the best mattress, providing excellent support for you, may now be too soft or too firm. The best mattress for you will depend on your sleeping position (side sleepers will have different needs to back sleepers), it will depend on whether you need pressure relief in certain areas and whether you require temperature regulation. It's quite the science. Below, we've rounded up the best mattresses to buy now and broken down which type of new mattress is best for you.Investing in the right mattress is one of the best ways to benefit your physical and mental health, with a good night's sleep proven to reduce your chances of getting a whole host of diseases. "Take your time to decide what works for you," says Jim Gerety, Managing Director of Vispring and all round mattress expert. If you are buying in person, "go back and visit a few times. Don't be embarrassed. Lay on your side, on your stomach - shuffle around a bit. We move in our sleep about twenty times per night, so see how that feels. I would also recommend wearing comfortable clothes. Most people don't sleep in thick jumpers with bags slung over their shoulders (unless you've had a really big night) so it's unrealistic to assess the comfort of a mattress while dressed like that."