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 Diaper Bags:
Diaper Bags are bags intended to carry supplies for babies such as diapers, wipes, etc. Diaper Bags often have several pockets to help keep things organized.
About Luggage:
Luggage is any number of bags, cases and containers which hold a traveller's articles during transit. Types of luggage include Suitcases, Duffel Bags, and Tote Bags. Today many types of luggage have wheels as an added convenience.
About Maternity:
Maternity refers to the types of apparel and accessories that are used by either mother or baby during or after the pregnancy period. Maternity can include apparel for expectant mothers or for newborn babies as well as Baby Gear such as Diaper Bags, Bibs, and Onesies.