MaxCold Ultra insulation: 20mm HDPE foam keeps food & drinks colder for extended periods of time Spacious zippered main compartment opens wide for effortless packing Easy-open lid with webbing pull-tab lets you quickly access contents in main compartment Adjustable, padded shoulder straps & padded back panel (all lined with breathable mesh), plus a sternum strap (that evenly distributes the load weight) make carrying this backpack comfortable Front zipper pocket gives you an additional storage option for your accessories