The ergonomic Komfort Hernia Chair is our full-featured version, designed for the prevention and management of various types of hernia disorders, both before and after surgery. The chair has a horizontal and concave back rest with minimal back contact, adjustable arm and knee rests, and a larger seat with a recess at the back to reduce coccyx contact. Fully adjustable. (Warning: if you suffer from a recognized back condition, always seek medical advice before use. Show your doctor this medical sheet).