Keep your core warm. This is the ideal piece when you need an extra layer for warmth, but don't want extra bulk slowing you down. No collar; low-cut arm openings. The second generation of NRS HydroSkin® has arrived. It's more durable with greater snag resistance, more comfortable with stretchier layers, and dries more quickly than the original. - New ThermalPlush™ fleece inner layer for comfort and low water absorption. - TiCoat™ membrane contains millions of titanium particles, to reflect your body heat back to you. - 0.5-mm neoprene insulates and protects. - Improved 4-way-stretch PowerSpan™ outer layer provides extreme mobility and rugged durability. - Odor-fighting antimicrobial treatment.