We bought this for a two week long road trip throughout Florida. Outdoor temperatures ranged from 65-80 degrees (inside the car temps?). The bag worked great. It was easy to carry and never leaked. We filled it up with ice cubes each day and it kept everything cold, including dairy, without any spoiling. It was great being able to pack restaurant leftovers or pack lunch items as we traveled throughout the state. The ice lasted all day, with some melting, despite being left inside the car or out on the beach. It is nicely padded making carrying the bag comfortable. We decided it was a “must” for road trips and we are extremely pleased with our purchase. We can’t speak for durability as it was only used daily for two weeks, but we foresee no issues. We highly recommend thus backpack cooler.