Ideal for Learning to windsurf for lighter ridersFast planing board for larger ridersDaggerboard for going upwind in light wind conditions Flow Rig: It is a compact sail with shorter luff and boom lengths. This gives the sail a lighter feel and allows the full range to work with as few as two masts. This sail bridges the gap between freestyle and freeride and power wave sailing. It offers a lot of range on outhaul adjustment so you can tune it for your preferred feel. This sail continues to be the best value in a 100% grid model. The sail has the soft feel of the Charge, but lots of power like the Phantom. Construction: This model features 100% grid construction, a new raised stainless steel 6-1 pulley with oversized rollers, and insignia tape reinforcing. All sizes have adjustable heads. Rod battens are used for this range. These are some of the lightest weight hassle-free sails available. SIZE LUFF (CM) BOOM (CM) BATTENS CAMS MAST WEIGHT (KG) 5.8 440 175 5 0 430/21 3.22 6.4 445 180 5 0 430/21 3.46 7.0 455 185 5 0 430/21 or 460/25 3.60 7.7 490 195 5 0 460/25 or 490/29 4.06 Epic gear Mast RDM 60% Aeron boom Epic gear base and extension