comfortcarry™ cushioned & air cooled padding ComfortCarry™ ergonomic dual-foam shoulder straps plus padded EVA foam back panel with cooling airflow channels for maximum comfort. easily accessible cargo Multi-direction access to 16L of cargo capacity through gaping clamshell main access or through swing-out side wing pockets. we make travel easier by taking the lug out of luggage PassPort™ luggage passthrough integrated into back panel provides sturdy placement on rolling luggage for convenient transport.