If you are a side sleeper, you need a different type of pillow than your friend who sleeps on her back. When choosing a pillow, pick one with natural fills and organic cotton casings; avoid fills made with chemicals. Wool, organic/natural latex, kapok and buckwheat pillow fillings are all breathable, healthy and supportive. The pillow should be matched with your preferential sleep position. Some pillows are fully customizable, allowing you to unzip and remove some filling to create your perfect pillow height. Make sure to do a bed test before you purchase to find the perfect pillow for you.