I work in an office and have some pain issues, so the company has set me up with a sit-to-stand desk (wonderful!) and a new chair (not so wonderful). I can never find a good position in the chair that will last more than a few minutes. It seems that the chair really is too soft, so that my sit bones don't make contact and I start to slump.
I am trying a wood chair where I do get that contact and it feels wonderful. It is not totally ideal, but for the most part I like it better that chairs with a soft seatpan. If I look at people with a more primal posture when sitting, they are all sitting on harder surfaces. What do you think?