Like to chase your personal best during your daily workout? With the Womens Air Lock Gilet from Jack Wolfskin nothing could be easier. This innovative sports gilet weighs hardly anything, is extra warm and delivers excellent breathability performance. Perfect for winter sports! Everything about this gilet is geared towards keeping weight to a minimum–including the ultra-lightweight shell fabric and the innovative mesh fleece lining. It consists of hollow fibres with a cross-section that looks like an eight-pointed star. The big advantage is, it weighs less than other fleece fabrics but provides better insulation. The fabric's knitted-like structure makes it extremely breathable. It is also air permeable. Exactly what you need when you're trying to improve your PB on the fitness trail.