Icebreaker Men's Helix Vest, Black, XX-Large Body: 100% Recycled Polyester; Lycra Side Panels: 39% Merino, 45% Nylon, 16% ; 100% Wool Heather Lining Imported Icebreaker Merino loft Technology Secure zippered front hand pockets Secure zippered internal stash pocket Internal storm flap Stretch side panels Secure zippered front hand pockets Internal storm flap Stretch binding at body hem and armhole