NIKE Men's Aeroloft 800 Running Vest BLACK AUTHENTIC 548152-746 Body: 100% Polyester Imported Lightweight breathable warmth; Packable design Variations in feather color may be visible through the fabric The streamlined design & elastic materials for a wide range of movement Reflective back zip pocket for secure small-item storage & enhanced visibility during low-light runs Front zip closure; 28.5 inch shoulder to hem