The VCOLD Hydroflex top differs from all other Hydrophobic tops in its overall weight and construction. Using a hollow yarn fabric that is super stretchy and light to wear, the VCOLD Hydroflex Top is able to trap a significant amount of warmth relative to its overall weight. In addition, the super soft plush lining feels so nice next to your skin and will get you excited about hitting the water no matter how cold it is out there!