In my opinion sky bag is the best one .i have been used 3 skybags since 10 year.it is long lasting and very stylist.it has sponge in the back side so that heavy things didn’t hurt me .its fabric is polyester so there is no water leakage in to the bag.All sky bags has awesome colour combination .It is better for school , office , journey olas.It is so light so that it does not hurt.It has special space for laptop.It has a special raincoat for which the bag can b cover itself .The size of bag is edible for all.Trere are different sizes of the bag.I have blue and black one and that was presented by me which I like most.