I would suggest a buckwheat smile cushion, bench and inflatable zafu to see which one or ones work best. We have an easy return policy. Just send it back in new condition within 21 days for exchange or full refund. Hope all is well. Dear Jack, The support cushion provides a little extra lift which can aid the seiza position.
Proper height is essential to successful sitting.
The thighs and everything below need to be lower than the hips for proper spinal alignment. Please note our new buckwheat support cushion which is real nice. You can also try sunning your zafu on a dry day. It will probably take several days depending on your climate. Sunning may fade the fabric, but it will probably fluff up the zafu as well.