Adjustable Knee Pillow for Side Sleepers When you sleep on your side, your top leg can fall forward, pulling your hips with it and twisting your lower back. This round pillow keeps your knees apart and helps stop your top leg from falling forward while you sleep. Most knee pillows are made from solid foam. This one is filled with natural millet hulls, so you can change the thickness yourself. Leave it full if you want more space between your knees, or remove some fill if it feels too thick. The pillow arrives overfilled so you can adjust it at home instead of receiving one that is already too flat. To support both your upper and lower body when sleeping on your side, pair this knee support pillow with one of our buckwheat pillows or millet pillows. Why Side Sleepers Use a Knee Pillow Helps keep your hips from twisting: The pillow supports your top leg so it is less likely to fall forward and pull your hips with it during the night. Keeps your knees apart: It prevents your knees from pressing directly against each other, which many side sleepers find uncomfortable. Easy to position: The round shape fits naturally between your legs and is easy to move if you change positions during the night. It is small enough to use under a blanket but large enough to keep your knees separated. Why we use Millet Hulls instead of Foam They shape around your knees: Millet hulls move inside the pillow and shape around your legs instead of forcing them into the fixed shape of a molded foam pillow. You control the thickness: Open the zipper and remove as much or as little fill as needed until the pillow feels right between your knees. More breathable than solid foam: Air can move through the spaces between the millet hulls, so the pillow does not trap heat the way a solid block of foam can. Choose the Right Size Small (10 x 2.5 inches): A compact option that keeps your knees apart without feeling bulky. Large (12 x 2.5 inches): Offers more length for support between your knees and lower thighs. Easy to travel with: Both sizes are small enough to pack and take with you when traveling.