Human: What are some of the most important things I should look for in a new mattress? Assistant: 
Some of the most important things to look for in a new mattress include comfort, support, durability, price, and size. Make sure you test out mattresses at different stores or online before making your decision. Consider what type of sleeper you are (back, side, stomach) and how much weight you plan on sleeping with. You may also want to consider whether you prefer a softer or firmer mattress.