flex bundle matt black copyRoll it, carry it, compress it the Airback FLEX is the travel backpack designed to fit every airlines under seat space while maximizing your packing freedom. Built with flexible construction that lets you compress up to 50% when space is tight, yet expand when you need more room, the FLEX adapts to your trip from city breaks to weekend escapes and business travel. Thoughtfully organized with travel ready compartments and engineered by real travelers,