What is a ZAFU? A meditation cushion, otherwise known as a zafu, can be helpful for correcting posture as well as being useful during normal yoga sessions. The translation of zafu is a cushion for sitting. Za means sitting or “sit” and Fu means cushion. These cushions provide much needed support during yoga. They also beneficial in strengthening your core, reinforcing your posture, giving yourself a boost, fortifying your resolve, and renewing you chi.