A veritable and versatile mid layer, the Helly Hansen Women's Flow Fleece Jacket is what you need to get in the flow. This jacket is insulating thanks to the 200g Polartech brushed fleece in the main body, and it has air pocket perforations, which captures body heat that the polyester shell outer fabric locks in. But it's not just all about the heat. The Flow is all about ventilation, so you are in control of your temperature regulation. The zippers in front allow for mechanical ventilation and stimulation of air flow, while the open mesh inside allows for air to flow between the air pockets and the body during intense activities. The regular fit and tricot lined sleeves help keep you mobile, so you can stay in the flow.