Longer cooling effect The Coolinger Rucksack Cooler uses efficient insulation technology and an integrated aluminum foil to keep foods and beverages well preserved for up to 4 hours. The internal insulation helps you enjoy the best taste of your meals any time, anywhere. Room organization Designed with multi-layer dividers and external storage pockets, this Coolinger backpack cooler offers space for fruits, drinks, and meals. It provides a roomy interior for your planned trips and outings. Ergonomic comfort Experience comfortable carrying with an ergonomic design, including straps shaped with pearl cotton padding and bead-like detailing. The thick breathable mesh reduces pressure for a comfortable wearing experience. Enhanced safety An adjustable shoulder strap buckle paired with a zipper and solid hardware ensures durability and convenience. The integrated reflective band improves safety during night travel, highlighting the attention to detail and high quality construction. Practical use scenarios - Day trips and picnics: keeps snacks and drinks cool while you explore. - School, work, and daily commuting: convenient lunch storage with organized pockets. - Outdoor adventures and travel: reliable cooling, comfortable fit, and enhanced visibility in low light. Key attributes - Function: portable cooler backpack with insulated lining and aluminum foil for up to 4 hours of cooling - Organization: multi-layer dividers and external pockets for fruit, drinks and meals - Comfort: ergonomic straps with pearl cotton padding and breathable mesh to reduce pressure - Safety: adjustable strap hardware and reflective band for enhanced visibility and durability - Compatibility and use: suitable for everyday use, outdoor activities, and travel with a roomy interior for varied contents - Material and performance: internal insulation and aluminum foil lining designed to preserve food quality and temperature The Coolinger Rucksack Cooler stays true to its design and function, offering practical features that address everyday needs and outdoor activities without sacrificing quality or reliability.