A sheepskin "rolling ramp"used by the Killen's as they spend a good part of the time inverted in their Romanys.  The backstrap is low and secures a closed cell foam block covered with artificial sheep skin. Main support in the cockpit is the lower lip of the seat, no backrest for normal paddling is used.  This way, full torso rotation may be utilized.  The sheepskin covered block is used to avoid the hard edge of the cockpit when doing layback rolls.