Single to double concave hull, batwing nose and tail. The fin configuration has been dialed in so that the fins work appropriately for each model. Very fast, will turn on a dime, and has unbelievable release off the wake. Gregg Necrason helped develop our 6 fin concept, and this is his board, the original multi-fin shape Too small for the 33, but too advanced for a smaller board, Shane Bonifay and other youngsters demanded a Trip of their own. Trip 28 for the hard charging grom. Includes Trip 1.5 center fins and Trip 0.7 outside fins. Recommended rider weight: 60-150 lbs.