Under Armour Storm Midlayer Zip Neck Sweater This golf jacket gives you extra warmth without packing on weight or bulk. How? Under Armour use hollow fibers that trap heat but with less weight than solid fibers. Rain also rolls right off, so you can wear it in any weather. Features of the Under Armour Storm Midlayer Zip Neck Sweater UA Storm technology repels water without sacrificing breathability Mid-weight knit fabric with an soft, brushed interior & a smooth, fast-drying exterior 4-way stretch material moves better in every direction Generous ½ zip front makes for easy layering Uses a fluorine-free water repellent treatment Made from: 88% Polyester/12% Elastane Machine washable