One of our best sellers-and with a good reason. It's warm by itself on moderately cool days, and makes an ideal mid-weight addition between a thermal inner layer and a windproof outer shell. Keep handy in your gear bag-you'll use it every day. Lycra® under arms add comfort and provide total freedom of movement. Combine with Hydroskin® Pants for full-coverage warmth. 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.