Panda Life Shredded memory foam pillows are made with viscose rayon derived from renewable bamboo. Shredded memory foam adjusts to your contours, supporting your head, neck and shoulders, allowing your muscles to relax, providing a more restful and rejuvenating night’s sleep. These pillows are on the firmer side (memory foam). Slept on them one night (with pillow covers and pillow case) and decided they were too firm for me. Excellent condition!