Sunice's Half-Zip Hybrid jacket is the perfect mix of a warm, thermal jacket & a stretch pullover mid-layer. It has a quilted Climaloft front which helps to trap your body warmth between the fabric to keep you warm on the course for longer. The breathability is fantastic & will keep you warm without letting you overheat & become too hot if the weather takes a gentle turn. The sleeves & back area have stretch fabric which means that you can keep a good range of motion whilst still keeping warm.