Perception continues the heritage of family fun on the water with the new Tribe series of stackable, sit on top kayaks. Perception Tribe 11.5 Sit-On-Top kayak  is about easy care, ease of use, and good times, all the way down to the bright color options. But don’t mistake low maintenance for low performance. This kayak is equally comfortable surfing ocean waves or cruising lakes and lazy rivers. Added length in the Tribe 11.5 means more speed, added storage, and an extra boost in the surf. The Perception Tribe 9.5 Sit-On-Top kayak Makes a great all-around boat for larger paddlers.