The ONeil Toddler Reactor 2mm wetsuit with exclusive FluidFlex in the shoulder and sleeves, fully adjustable super seal neck and Krypto Knee Padz. A great entry level wetsuit. , Features:, Krypto Padz, 30% FluidFlex/70% Fluid form. YKK Back Zip System, Single Super Seal Collar: fully adjustable seal, Hidden key pocket, Flatloc Stiched (breathable seams), Strategic Seamless Paddle Zones, , Materials:, Top Sleeve/undersleeve: FluidFlex, Body: FLuid Foam, Chest/Back: Mesh Smooth Skin Fluid Form, Knee: Krypto Knee Padz, Neck: Smooth Skin Fluid Foam,