The Spyder Men's The Hybrid Shirtjack Insulator is just the perfect combination between a flannel shirt and a jacket, giving you the warmth and comfort you need. This insulator is made from stretch polyester which gives you durability, comfort and flexibility while its 60 g PrimaLoft® insulation will keep you warm in cold temperatures. Its water repellent coating, zippered hand and chest pockets as well as its snapped front and casual look add to an already great insulator making it go far beyond the basic needs. This insulator has combined the warmth and functionality of a ski jacket with the style of a long sleeve button up. You'll never need to decide between wearing a flannel or jacket ever again with The Hybrid ShirtJack!