The Osprey AirPorter Backpack Travel Cover - Medium is an excellent option for travel. This cover is designed to protect your pack while you're on the go and also doubles as a duffel bag for extra space when you need it. The shoulder strap provides a comfortable carrying option but the cover also features side and top grab handles if that's your preference. The zipper opening is large for easy use and is lockable to keep your belongings extra safe and secure. When not in use, it can be packed into itself for convenient storage.