Heatstroke prevention goods: Cooling pad Used only once with a backpack. Wiped with alcohol disinfectant wipes. No instruction manual. 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. Naturally freezes at around 28°C or below. Freezing is easy, even with tap water, so you can refreeze it on the go, not just in the freezer. Not too cold like ice, and safe to touch directly on the skin. Mild coolness 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 cooler, back sweat prevention goods, cooling, cooling sheet, backpack, stroller, freezing, heatstroke prevention, heat対策, outdoor work