Choosing the dive bag that is right for you all depends on the type of gear you will be taking with you. A padded Specialty bag is necessary when carrying that new computer that you just bought. When you are travelling a lot, a Roller bag is the way to go. Duffel bags are a popular choice amongst divers who like to keep things simple. If you are looking for more features, a Backpack style bag offers both more features as well as styles. Dry bags are just like all dive gear, you should consider the type of diving you do, how often, and what fits your style.