When surfer Nat Young is pinning it down the line and laying down smooth, arcing turns, the last thing he wants is his board to wash out from inadequate fin hold. That's why he runs the Creatures of Leisure Nat Young Arc Medium Single Tab Tri Fin Set -- lightweight carbon fiber construction paired with a 34.3° sweep and flat foil give this thruster setup reliable carving abilities at high speeds down the line. The 'Medium' size is ideal for surfers 145 - 175 lbs.