Thermo-X layering fabrics provide incredible insulation with low bulk and quick-dry properties.Key FeaturesMaximum Base-Layer Insulation4-Way Stretch FabricWater RepellencyRash ProtectionStrategic Seam PlacementSuper Low Neck: No Interference with Wetsuit NeckBoardshort Connector1mm Glideskin HoodConstruction220g Nylon/Spandex with HyperDry for maximum insulation and minimal water absorptionThermo-X HyperDryFlatlock Stitched Breathable Seams