A Zafu cushion is a round, firm cushion commonly used in meditation practices. It provides support and comfort for the sitter, helping to maintain proper posture during meditation sessions. Typically filled with natural materials like buckwheat hulls or cotton, the Zafu is designed to elevate the hips, allowing the knees to rest comfortably on the ground. These cushions are often paired with a Zabuton, a larger rectangular mat that provides additional cushioning for the legs and feet. Together, they create a comfortable and supportive environment for practitioners of various meditation styles, including Zen and Vipassana.