I am always been warned to watch out for pressure sores. Fortunately, knock on wood, I have not experienced any severe issues. I like to think that perhaps it is a result of precautions I take. Padding where bones impact hard surfaces is key. My favorite cushions are made by a company called Roho. They have air bladders in them which can be inflated or deflated as needed. They also come with a pump. While these may be a little pricier than other cushions … they are worth it.. I will include a link to the ones I use , in the sidebar