Thank you for viewing! A must-have for summer heatstroke prevention! It can be used comfortably at 28°C, providing optimal cooling effects. No water or electricity is needed; it freezes naturally. The part that touches the back of the neck has been increased, and the duration has also been extended♡ Size: 196mm x 155mm x 28mm [Shipping] Will be shipped in simple packaging via regular mail. Please purchase only if you understand that this item is stored at home. Neck cooler Cool neck Summer measures Heat measures Gold neck Cooling neck #dafe_DailyNecessities K1-009