Hot Waterproof Swiss Gear Multifunctional Men Luggage & Travel Bags Brand Knapsack,rucksack Backpack Hiking Bags Students School Shoulder Backpacks 15 Inch Laptop Macbook Computer Business Bag Office Briefcase FREE bag rain cover and password padlock ulti-panel airflow design provides extra padding for comfort and maximum back support Shoulder Strap System Internal pocket includes special pouch to secure and hold CD or MP3 player with an external headphone port Organizer Designed to adjust backpack volume while securing contents and preventing unwanted vibration Specially contoured shoulder straps are ergonomically designed with added padding for comfort and control Water Bottle Pocket