While hybrid mattresses have a number of advantages over foam mattresses, there are some areas where they underperform. For one, all-foam mattresses have no springs and are quieter when you move around in bed than hybrids and innerspring mattresses. Memory foam contours to your body better, which many people find to be more comfortable — particularly those who like to sleep “in” their mattress as opposed to “on” it.Because foam transfers less motion than springs, memory foam mattresses can be a better fit for couples, particularly if one partner is a restless sleeper. For those on a tight budget, you can usually find a high-quality foam mattress for far less money than a comparable hybrid.