Used once for a short period and home cleaned. ¥13,800 Material Composition: Nylon, 70D TPU polyether composite fabric, 5mm XPE reflective film, ABS plastic Washing Instructions: Machine wash Country of Origin: China About this product [Built-in water tube] The appearance is much neater, less bulky, and looks beautiful when worn. This design gives a stylish impression without compromising functionality. [300% cooling area UP] The entire back becomes cool, and the cooling effect is excellent. The perceived temperature drops significantly, and you can feel even more comfortable coolness. Cooling effect is improved. [Cool circulating water with frozen plastic bottles] By putting in frozen water bottles, the cooling effect is increased, and you can easily hydrate with melted plastic bottle drinks. [Low noise operation] It does not produce loud noise during operation, making it ideal for environments where silence is required, such as indoors or libraries. You can use it comfortably even in quiet places and work without worrying about disturbing others. [Easy one-handed operation] Start-up and mode switching can be done with this single button, making it easy to operate with one button. [Water-repellent finish for comfort] The surface of the pouch is made of water-repellent polyester material, which repels dirty water and other liquids during work. This allows you to use it with peace of mind without worrying about dirt. Description Product specifications (specs) Size: Shoulder width 42cm, Front hem width 41.5cm, Rear hem width 39cm, Length 52cm Color: Black / Black Material: - Clothing body: Nylon - Internal tank: 70D TPU polyether composite fabric - Insulation layer: 5mm XPE reflective film - Buckle: ABS plastic Front zipper length: 19cm Internal pocket size: 17cm × 25cm Water pump performance: - Output: 5V 120mA - Flow rate: 400〜500ml/min