The Med X Junior is a one- piece shorty 3 mm with double- lined neoprene. Perfect for kids who love diving or snorkeling in tropical waters. The neoprene chest area is smooth which provides greater elasticity. It protects swimmers from jellyfish. It features smooth neoprene inserts on the wrists and legs that minimize water infiltration. It is lightweight and easy to put on. Please use the size chart as a reference in order to get the best fit.