Heatstroke prevention goods: Cooling pad Used only once with a backpack. Wiped with alcohol disinfectant wipes. No instruction manual included. Please refer to the third image for the size. Freezes when cooled! Keeps your back cool and comfortable! Perfect for backpacks and strollers in the hot season. Easy to attach. Reusable! Made from plant-based materials, so it's safe. For backpacks, school bags, strollers, and child seats. Freezes naturally at around 28°C (82°F) or below. Freezing in the freezer is of course possible, but it also "freezes with tap water," making it easy to refreeze when you're out and about. Not as cold as ice, and safe to touch directly on the skin. A mild coolness that feels great and cools your neck! For heatstroke prevention during outings and outdoor work! ■ PCM material developed to protect astronauts from rapid temperature changes in space ■ Mild coolness ■ Less condensation, stays dry ■ Reusable Back cooling, back sweat prevention goods, cooling, cooling sheet, backpack, stroller, freezing, heatstroke prevention, heat measures, outdoor work