The Orca 3.8 raises the bar once again with the Exo-Cell Buoyancy System. The 3.8 uses a combination of the Exo-Cell System and Aerodome 2 to give the optimum swim position. This combination utilizes the buoyancy attributes of each material to help you achieve equilibrium and reduce drag. Your torso and legs are lifted higher in the water, optimizing the swimming position, which in turn improves swim performance. Designed for swimming endurance distances, or for swimmers who will benefit from an improved torso and leg position in the water, the flexibility of the 3.8 has also been enhanced with the introduction of 1.5mm-2mm #44 cell Yamaoto neoprene panels on the arm and underarm areas along with the use of our exclusive Infinity Skn lining.