FCS PG-5 Tri Fin Set Blue. PG stands for Performance Glass: a specially formulated material that mimics the flex patterns and feel of traditional fiberglass fins, but offer a stiffer base for increased responsiveness and drive. The PG-5’s are a very popular among the pros and are perfect for a variety of conditions and wave heights. This medium sized fin template will offer greater performance and liven up most any board. This is a perfect setup if you’re looking for a renowned, high performance design with excellent drive, pivot, and hold all across the board. Optimum weight: 140lbs - 175lbs (65kg - 80kg)