Wind protection with upgrade option for added warmth. The Men's Glen Vest is a windproof, insulated gilet with a System Zip. The zip allows the gilet to be be teamed with a compatible Jack Wolfskin inner jacket to create a warm and functional combination .The Men's Glen Vest is also very practical to wear on its own. It has a soft, windproof outer fabric. And robust Microguard synthetic fibre insulation that's guaranteed to keep you warm.