Material --- Our Backpack is made of Water Resistant and Durable canvas with metal zippers. Ensure a secure & long-lasting usage everyday & weekend.Dimension--- Our Backpack size is 15.6"L x5.9"H x 11.7"W; Suitable for professional office workers, college students,high school students, boys, girls, teens, adults.Applications--- This backpack is perfect to be a day pack. Perfect for going to school, work, weekend get-away, biking, camping, gym, travel, etc.Characteristics--- Comfortable airflow back design with thick but soft multi-panel ventilated padding, gives you maximum back support. Breathable and adjustable shoulder straps relieve the stress of shoulder. With a hidden anti theft pocket on the back protect your valuable items from thieves.Money Back Promise--- We promise you will love our Backpack, or we'll return your money back within 3 working days. You can keep the backpack, this is our crazy promise Material --- Our Backpack is made of Water Resistant and Durable canvas with metal zippers. Ensure a secure & long-lasting usage everyday & weekend.Dimension--- Our Backpack size is 15.6"L x5.9"H x 11.7"W; Suitable for professional office workers, college students,high school students, boys, girls, teens, adults.Applications--- This backpack is perfect to be a day pack. Perfect for going to school, work, weekend get-away, biking, camping, gym, travel, etc.Characteristics--- Comfortable airflow back design with thick but soft multi-panel ventilated padding, gives you maximum back support. Breathable and adjustable shoulder straps relieve the stress of shoulder. With a hidden anti theft pocket on the back protect your valuable items from thieves.Money Back Promise--- We promise you will love our Backpack, or we'll return your money back within 3 working days. You can keep the backpack, this is our crazy promise