At a certain point, you may decide that it’s time to move on from the cheapest option you can pick up and invest properly in a mattress. The mattress’s material plays an important role in deciding the quality of your sleep, a choice that shouldn’t be made lightly. To help you make that decision, we’ve compiled an explainer of the most common types of mattresses — from memory foam to ones made from environmentally friendly materials — along with their pros and cons and our favorite brands for each type. To sweeten the deal, we’ll also let you in on the hottest sales currently on offer at these mattress brands. Thank us later for a peaceful slumber.