I saw that a few had brought up proper inflation of ROHO seat cushions. I have been using a roho high profile cushion for over 9 years,so far no skin problems even tho i'm high risk due to me having diabetes. At first we used to put full amount of air or even overfill the seat cushion.....then we were told that ROHO is actually made for the person to sink into or settle into it a bit., Just as long as your butt don't totally hit bottom. By not having the seat to full, you are able to have much better balance. You can have someone sit in the seat and tell you if their butt is hitting bottom, also it is kind of hard to bottom out as the air spreads out as you sit, so you or a helper can pretty much tell by looking at the thickness in front of the cushion in between the leg area. Proud Roho user Dan :-)
