O'Neill Youth Reactor 3/2mm Back Zip Full Wetsuit Top Sleeve/Under Sleeve: FluidFlex, Chest/Back: Mesh Smoothskin Fluid Foam Krypto Knee Padz, Ergonomic Knee Protection, Smoothskin Fluid Foam Neck 30% FluidFlex/70% Fluid Foam, YKK Back Zip System, Single Super Seal Collar: Fully Adjustable Seal Hidden Key Pocket. Flatloc Stitched (Breathable Seams) Strategic Seamless Paddle Zones