TheFluxis a state-of-the-art Freeride Sail. Both the 5.5 and 6.5 are short enough on the luff to rig on a 400cm mast. This allows the rig to feel light even with an epoxy mast. The sail is built of 100% x-ply for a lightweight durable product. The Flux smaller sizes are great for smaller frame and youth sailors. The sail is built using all grid construction to offer both durability and light weight. It features areduced luff curve allows for easy rigging and a softer more responsive feel resulting in rapid skills improvement. Construction: This model features 100% grid construction, a stainless steel 6-1 pulley with oversized rollers, and insignia tape reinforcing. Rod battens are used for the entire range. These are some of the most user friendly intermediate sails available. Each sail ships with a rig bag that can easily accomodate all the components of the rig in one easy to carry bag. SIZE LUFF (CM) BOOM (CM) BATTENS CAMS MAST WEIGHT (KG) 3.5 325* 153 4 0 340 2.2 4.2 328* 166 4 0 340 2.3 5.0 425* 184 4 0 400 2.4 5.5 425* 183 4 0 400/19 2.6 6.5 430* 200 4 0 400/19 3