1 mm HydroSkinå¨ 1.0 provides twice the insulation of HydroSkin 0.5, without feeling bulky or restrictive. With four-way-stretch comfort and soft ThermalPlush lining, it feels as good as it looks. Paddler-specific design puts seams where they won't cause irritation. The chest, back, shoulders and upper arms feature water-shedding smooth-skin neoprene to help prevent evaporative cooling. HydroSkin is lightweight wetsuit apparel; it's designed for a snug form fit that restricts water entry and locks in your body's warmth. Thinner HydroSkin 0.5 panels under the arms reduce bunching for greater paddling comfort.