Waterproof bootie construction inside a mesh and leather upper with TPU welding. Padded collar and tongue. OrthoLite® X40™ sets the industry standard for high rebound performance with an elasticity rating over 40%. EVA midsole with toe guard plus Vibram® Arctic Grip® three season traction outsole with Wet-Ice Technology. Removable Footbed, Waterproof, OrthoLite®, A5500 pending.