The HydroSkin® Farmer John gives you the freedom and comfort you can't get from 3mm neoprene. A great piece to wear alone or as a layer on those chilly days in cold water. A thermal core of 0.5-mm neoprene provides insulation. HydroSkin has the added benefit of 4-way stretch PowerSpan™ for added mobility and comfort. Titanium laminated adhesive aids in body heat retention. ThermalPlush™ inner lining for added comfort and quick drying. Double-pull men's relief zipper makes life that much easier on the water. Padded knees and shins reinforce that high wear area and give added protection against collision.