A heated mattress pad is a bedding layer designed to add warmth to the sleep surface. Most electric models place heating elements inside a thin pad that sits between the mattress and fitted sheet, allowing sleepers to adjust the amount of warmth according to the product’s controls and settings.
A pocket spring mattress uses individual coils wrapped in fabric sleeves so each spring can respond more independently to pressure. Sleep Foundation’s guide to pocketed coils explains that this construction is common in modern hybrid mattresses and can improve contouring and motion isolation compared with interconnected coil designs.
Finding the best mattress for lower back pain starts with understanding how your mattress supports your body during sleep.