... denier Nylon fabric, w/built in open air active amplified speaker P120814 SPORTS MUSIC VEST- made ... duty denier Nylon fabric, w/built in open air active amplified speaker (output power: 500 mW, electronic volume ... reflective straps on back & front for enhanced visibility of wearer in night condition. Packing: each set in ... cuft.). One pattern, 4 colors of blue, grey, black, orange. 3 sizes of S/M/L. Q’ty ...