This golf jacket will give you more warmth without adding weight or bulk. How does it work? We use hollow fibers, which trap heat but are lighter than solid fibers. It is rainproof, so it is suitable for any weather. UA Storm technology is water-repellent without compromising breathability Medium-weight knit fabric with a soft, brushed interior and smooth, quick-drying exterior 4-way stretch fabric provides greater freedom of movement in all directions With a generous 1/2 zipper at the front, it's perfect for layering the look Fluorine-free water-repellent layer