The Whitewater Series packrafts are designed for more challenging water, such as whitewater rivers with rapids and obstacles to avoid. They are more playful in rapids, with a longer bow and stern.  You can surf and do advanced moves, but for most paddlers this range just makes whitewater more fun. Includes thigh braces, self-bailing. Also available with a fixed spray deck and skirt. 
Features
New stern shape  - easier to roll, carves turns.
Integral seat/floor. - stiffer
Long attachment ladder means the paddler can sit anywhere.