SAFETY ASSURED: Insulated backpack designed to improve lowlight visibility, this backpack includes reflective strips that ensure user safety during nighttime activities like walking or camping without compromising style ADVANCED THERMAL PROTECTION: Food cooler box for men designed with waterresistant heatblocking fabric and a doublelayer aluminum lid, this insulated backpack provides longlasting cooling, preserving drinks at low temperatures for 8 hours and keeping food fresh for 4 during the day SPACIOUS STORAGE DESIGN: Cooler bag for men provides a generous 50L main compartment, along with front double pockets and elastic mesh, for versatile and practical packing options WATERPROOF PROTECTION: Leakproof backpack with reinforced stitching and a waterproof inner layer, ensures spill liquid transport such as bottles or soups, offering peace of mind during travel or daily use Use scenarios Day trip or picnic: The 50L main compartment allows you to carry drinks and meals together. The 8 hour cooling for beverages and 4 hour freshness for food help keep perishables ready to enjoy while on the go. The leakproof and reinforced construction minimizes the risk of spills during transport. Nighttime walking or camping: Reflective strips improve visibility in low light, supporting safer nighttime activities while maintaining a clean, professional look. The insulated design helps keep drinks cool and food fresh during outdoor outings. Travel or daily commuting with liquids: The waterproof inner layer and leakproof design protect against spills in transit and on daily errands. Reinforced stitching adds durability for frequent use, while the 50L capacity accommodates daily lunches or travel snacks.