The Lady Sunlight Half zip top is a fantastic quality, lightweight winter running top. Designed with moisture wicking fabric to keep you dry and comfortable at all times.Moisture Wicking Fabric - keeps you cool and comfortable at all timesFlatlock Seams - helps to avoid chafing and adds to comfortReflectivity - for added visibility in low light conditionsThe Sunlight top is the perfect lightweight winter running top which will make sure you are comfortable no matter how many miles you do. What is Cooling and Venting? The human body performs best at an external temperature of around 80°F. Microfibre is essential for balanced temperature management, as it keeps the temperature constant. Products made of microfibre are more breathable than natural fibres and have excellent thermoregulation qualities. Stretchy, fast-drying microfibre garments are durable, easy to wear and easy to care for.