Brand new, unused! Opened for photography purposes! The outer box has some cracks due to home storage. Please check the images. Color: Khaki (Although it's labeled as khaki, the actual color is more like beige) Latest PCM Cooling Technology for Continuous Cooling: Reduces back sweat as a cooling pad for backpacks during summer outings, commutes, school, and shopping. Phase Change Material (PCM gel) adopted from NASA technology naturally freezes below 28°C, providing continuous cooling when combined with a cool backpack. Keeps you cool for 60-90 minutes in an environment of 25-35°C (more energy-efficient than conventional cooling materials). Using the physical phase change principle like "ice that doesn't melt," it keeps your back cool and prevents body odor. Safe for use by adults and children. As a heatstroke prevention item, it's designed for safety for both adults and children.