SMART BAG PACK WORKING WITH COOLING FAN PLUS POWER BANK FOR CHARGING PHONE

360 DEGREE SURROUND VENTILATION IS TRULY COOL, WHICH IS BLACK TECHNOLOGY.COOL FROM HEAD O TOE, COMPARABLE TO AIR CONDITIONED BODY FEEL.SMART BAG PACK WORKING WITH COOLING FAN AND POWER BANK FOR CHARGING PHONE.BACK DESIGN, CAN BE USED WITH A SUITCASE TO RELEASE SHOULDER PRESSURE WHEN CARRYING A BACKPACK.