Backpacks are bags that possess two shoulder straps which allow the wearer to carry the bag on their back. Backpacks are often associated as a student's must have school accessory for carrying books, etc from class to class.
About Moisture Wicking:
Moisture wicking is the property found in some synthetic fabrics that transfers moisture away from the body onto the outer layer of the fabric where it dries faster. Moisture wicking is typically used in athletic apparel designed to improve moisture evaporation and breathability, which helps increase the performance and endurance of the athlete.