The author of The Happy Sleeper, Heather Turgeon, says that “because of the greater distance between their heads and the mattress, side sleepers often need a thicker pillow to keep their head and neck in a neutral position.” This means that when picking a pillow to support their head, a side sleeper should aim for extra-firm support. While a fluffy soft pillow seems comfortable, in reality, it’s the firm pillows that give your head the lift it needs. The Nectar pillow, made out of memory foam, is a good choice because it comes overfilled: you can adjust the stuffing until your pillow is just right.