A protective cushion includes an outer shell enclosing a pad comprising high-density foam. The cushion provides protection to a user's knees, such as while praying or meditating. The outer shell of the cushion is water-resistant, stain-resistant, and able to withstand excessive wear and tear. Further,...http://www.google.sh/patents/US6951035?utm_source=gb-gplus-sharePatent US6951035 - Protective cushion
