Solo Leveling Pillows in Solo Leveling Shop. Solo Leveling Pillows are the perfect addition to any bed and make a great gift! We have a variety of colors, styles and shapes of pillows. All of our pillows are made with 100% cotton, premium materials and workmanship. Whether you want to stay in one spot for a rest or change your sleeping habits to help ease back pain, Solo Leveling has the pillow for you.