Flexible the orca trn offers exceptional flexibility across the shoulders as it is construction with 2mm neoprene flexibility in the shoulders is important for a comfortable natural feeling swim stroke optimum body position constructed of 2 4mm neoprene for optimum power correct body positioning and buoyancy in the water the 4mm smoothskin neoprene over the hips and bottom provides exceptional buoyancy by lifting the swimmer out of the water to ensure the correct body position fast and