Outdoor insulation with combined functionality: The Men's Glen Vest is a super-versatile gilet. The System Zip allows you to team the gilet with any compatible Jack Wolfskin fleece jacket from to create a warming combination. The gilet features Jack Wolfskin's light yet robust Microguard synthetic insulation. It also uses Stormlock as the outer fabric, which makes it windproof. So whether it is worn on its own or in combination with a fleece, it gives you all-round warmth and wear comfort.