A Zafu is a round cushion traditionally used in Zen meditation. It provides support and comfort for practitioners sitting in a cross-legged position, helping to maintain proper posture during meditation sessions. The cushion is typically filled with natural materials like cotton or buckwheat hulls, allowing it to conform to the user's body. Zafus come in various sizes, colors, and designs, making them suitable for different preferences and styles. They are often paired with a Zabuton, a larger mat that provides additional cushioning for the knees and legs. Together, these items create a comfortable meditation space for individuals seeking mindfulness and tranquility.