The stretch woven construction and athletic cuts allow full mobility for active cold-weather pursuits like hiking, climbing and mountaineering. Front zip pockets provide on-the-go storage and lightweight yet durable fabrics withstand abrasion. Jack Wolfskin mid-layers also retain insulating properties even when wet. Moving in sync with the body across dynamic mountain landscapes or neighbourhood nature trails, Jack Wolfskin insulating layers combine high-tech performance with eco-conscious production to bolster outdoor performance.