Navy cooling vest with a -19°C cooling effect thanks to a Peltier plate and 60% increased airflow. - Brand: THANKO - Model Name: Vest Type Cooling Vest 4 - Size: F (M-LL) - Color: Navy - Cooling Function: Peltier plate -19°C - Fan Effect: 60% increased airflow - Product Number: TKCV25 / TH605 Battery 3.7V 20000tAH, no box New, unused, but no warranty, instruction manual included, box slightly damaged Initial operation confirmed, no plastic packaging due to operational check. Returns are not accepted, so please confirm the size before purchasing. Thank you for viewing.